Synthetic insulation avoids the main weakness of down insulation by remaining functional and warm when wet. When caught unaware by stormy weather, synthetic insulated jackets will not lose their loft, as opposed to down, which will clump up and lose a lot of its insulating properties.

　　Additionally, synthetic insulation is significantly cheaper than down, is vegan-friendly, and tends to be more breathable. The benefits of synthetic insulation remain tempered by a few significant drawbacks, though — synthetic materials are often heavier and less warm than down, and theyre not quite as compressible.

　　However, as new insulation innovations hit the market with each passing season, the marginal differences between down and synthetic are quickly disintegrating. Many synthetic insulated jackets now rank among the best insulative clothing on the market.

　　Our team collectively tested a plethora of these puffies for the creation of this guide, with current author and Senior Editor, Chris Carter, having put over 25 different models through grueling tests in the past year alone. He dangled off jugs thousands of feet in the air, postholed through sludgy snow, and huddled around countless campfires with these synthetic layers to bring you the streamlined selection you see today.

　　While testing each product we focused on a number of key metrics. We evaluated each jacket based on fit, comfort, and durability. Breathability, pack size, and overall value were also important considerations in our testing process.

　　While there isnt a single jacket for everyone, weve highlighted useful features of each of our recommendations to help you find the best jacket for your needs. At the end of our list, be sure to check out our comprehensive buyer’s guide, as well as our comparison chart. And if you have some questions, take a look at our list of frequently asked questions.

　　Editors Note: This Buyers Guide was updated on April 18, 2024, adding the lightweight Stio Dawner Hooded Jacket , which features the unique Octa Lightweight Knit Insulation with a raised diamond grid texture.

　　The Best Insulated Jackets of 2024 Best Overall Synthetic Jacket: Arcteryx Atom Hoody Best Budget Synthetic Jacket: Cotopaxi Teca Cálido Hooded Jacket Runner-Up Best Synthetic Jacket: Black Diamond Vision Hybrid Hoody Warmest Synthetic Jacket: Patagonia DAS Parka Lightest Synthetic Jacket: Enlightened Equipment Torrid Jacket Best Active Insulation Synthetic Jacket: Black Diamond First Light Stretch Hoody Best Overall Synthetic Jacket Arc’teryx Atom Hoody Specs Insulation Coreloft 60 (60 g/m²) Weight 13.05 oz. Key features 2 hand pockets with hidden zippers, zippered chest pocket, gusseted underarms for mobility Pockets 3 (2 zippered handwarmer pockets, 1 internal zip pocket) Shell fabric Tyono, 100% nylon 20 denier shell with DWR treatment

　　Pros Breathable but still warm Durable fabrics that move well during activity Stylish look with a great, comfortable fit Cons Expensive No integrated stuff sack Chris Carter The lightweight cousin of the popular Atom AR, the Atom Hoody ($300) is a time-tested classic for high-output adventures, and is one of our favorite active insulators on the market. How often you snag a jacket from the closet while running out the door for spontaneous adventures is a good indicator of how solid it is, and we grab this one pretty much every time.

　　As a hardworking midlayer or a standalone piece in milder temps, there are few jackets out there that have better mobility, are comfier, or boast greater warmth-to-weight ratios. The versatility of this thing is really where it shines.

　　While not quite as breathable as others, the Atom scored high points in our book for its ability to be worn during intense activity in cold climates, while also packing a solid amount of heat into a sleek, stylish design. We love that you can take this jacket on fast, cold-weather excursions or climbs without having to compromise warmth and weather/wind resistance like a lot of other active insulators.

　　The gusseted underarms, stretchy sides, and athletic fit allow the jacket to move with you phenomenally, and the interior fabric is soft and comfortable. Youll be wearing this thing all day. Couple this with thoughtful features such as fleece-lined pockets, an adjustable hood, and improved cuffs, and well, thats why Arcteryx is tough on the wallet.

　　For speedy adventures in the wild where solid breathability with maximum warmth is required, or for just trotting confidently through town, itd be difficult to find a better jacket for the job. We think its just about the best synthetic insulated jacket on the market.

　　$300 at REI Mens$211 at REI Womens$300 at Amazon Mens$300 at Amazon Womens Best Budget Synthetic Jacket Cotopaxi Teca Cálido Hooded Jacket Specs Insulation 100% recycled polyester (60gsm) Weight 13.5 oz. Key features Colorful funky design, reversible Pockets 5 (2 zippered handwarmer, 2 internal drop-in, 1 zippered chest) Shell Fabric Repurposed polyester taffeta with DWR finish 600mm PU backer

　　Pros Sleek and stylish with tons of fun color combos Reversible with two different styles Packs into chest pocket Sustainable construction Affordable Cons Not the most premium insulation Not the softest next-to-skin feel Subpar mobility Chris Carter Its common knowledge — if you wanna stand out, you need to snag a Cotopaxi jacket. Few companies have pulled off the funky, flashy aesthetic as smoothly as Cotopaxi has, across a broad spectrum of outdoor gear. With a sustainably durable build, reversible design, and just enough spunk for light adventuring, the loud and proud Teca Cálido Hooded Jacket easily snagged a spot on this roundup. And, at a mere $150, your wallet will love you much more than some other choices youll find on the market.

　　Weve always been fans of this brands ability to repurpose a mish-mash of materials into solid, backcountry-ready products, and their Gear for Good slogan sums it up pretty well. While its not the most performance-oriented design on our list, the Cálido is by far the best bang for your buck of the jackets we tested and accompanied us on many travels during our evaluation period. Across most color choices, you have a bright, multi-paneled design on one side, and a subtle, muted quilt silhouette on the other. When you want to make a statement, youve got it — but a quick flip and youll blend in with the crowd.

　　This is consequently one of our favorite crossover pieces for style and function in a variety of different urban, and outdoor scenarios. Though we gravitate to more technical models for serious objectives, the Cálido feels right at home on casual hikes, chill days at the crag, or long road trips. Its bulky nature, lack of stretch, and minimal breathability limit its useability though.

　　We appreciate the well-designed pockets on either side of the jacket, and the fact that a discrete zippered chest pocket doubles as a stuff sack — though its a bit of a battle to get it in there and close the zipper.

　　A DWR finish on the shell fends off light precipitation, but the sheer amount of stitching around the multitude of different panels means rain seeps in fast and quickly soaks the insulation. The 100% recycled polyester fill keeps us adequately warm in mild temps but isnt the most premium insulation we tested. The lack of stretch in the polyester taffeta face fabric does give it a noticeable boost in wind resistance though.

　　These qualms aside, at this price point itd be difficult to find a jacket that offers a better value. For mild adventuring or unique style around town, the Teca Cálido Hooded Jacket is definitely an affordable force to be reckoned with.

　　$150 at REI Mens$126 at REI Womens$150 at Amazon Mens$117 at Amazon Womens Runner-Up Best Synthetic Jacket Black Diamond Vision Hybrid Hoody Specs Insulation PrimaLoft Gold Crosscore synthetic insulation with Aerogel (100% Polyester, 60gsm) Weight 15.4 oz. (men’s medium) Key features Aerogel technology boosts warmth, over the helmet hood, harness-compatible zippered hand pockets, breathable fabric on underarms and back panels Pockets 3 (two zippered handwarmer pockets with left pocket functioning as a stuff sack, one zippered chest pocket) Shell Fabric 20 denier Pertex Quantum Air nylon with Liquid Crystal Polymer Ripstop and DWR finish

　　Pros Extremely versatile Warm yet breathable Thoughtful features that boost comfort Cons On the heavy side Hood is floppy if not wearing a helmet Chris Carter Our Vision Hybrid Hoody ($295) has wound its way up endless mountain switchbacks, hung off small crimps thousands of feet in the air, traveled to Africa and battled around the savanna, fought thorns and briars while bushwhacking along rivers — it has essentially come with us everywhere we go.

　　For a couple of straight months, this technical active insulator was the first layer we grabbed for pretty much any adventure we found ourselves on. We love it for fast-paced hikes when our heart rate soars, long multipitch climbs in chilly temps, and as a quiver-of-one jacket for international travel. This is a definite contender for our top pick.

　　When a jacket employs technology used in literal space suits, its a good idea to give it a shot. 60g PrimaLoft Gold insulation is paired with Cross Core technology and NASA-developed Aerogel, which significantly boosts warmth while remaining extremely light and packable. Burly, 20-denier Liquid Crystal Polymer nylon is used in high-abrasion areas, while more breathable, stretchy fabric is placed on the underarms and back panels to increase mobility and moisture control.

　　This makes the Vision Hybrid a phenomenal jacket for high-output missions like rock climbing or mountaineering. It breathes well, but packs the heat when you need it to.

　　The design is undeniably well-engineered, and caters to the active athlete. It moves with you seamlessly as you contort your body on technical climbing moves, or vault over trees and boulders on trail. The elastic draft gasket seals in warmth in windy environments, but the breathable material around key areas prevents you from overheating while charging hard.

　　Is this the perfect jacket? Well, we like most things about it, but did find ourselves wanting a bit more wind resistance, a snugger hood while not wearing a helmet, and a lighter weight overall. The athletic fit also makes it a tad difficult to add layers underneath.

　　These qualms aside, we feel that the Vision Hybrid is one of the best synthetic jackets money can buy right now. With a sleek design, stellar breathability, surprising warmth, and notable mobility, dont think twice about adding this to your arsenal.

　　$295 at REI Mens$280 at REI Womens Warmest Synthetic Jacket Patagonia DAS Parka Specs Insulation 133 and 40g PrimaLoft Gold Insulation with aerogel technology Weight 19.6 oz. Key features Weather-resistant fabric, helmet-compatible hood, two-way front zipper for easy belaying and climbing Pockets 5 (Two zippered handwarmer pockets, one zippered chest pocket, two deep internal dump pockets) Shell Fabric 0.8 oz. 10 denier Pertex Quantum Pro recycled nylon with polyurethane dry coating and DWR finish

　　Pros Super warm Phenomenal weather and wind resistance Climbing-specific design Cons Pretty heavy Bulky Expensive Chris Carter Patagonias warmest synthetic jacket, the DAS Parka ($449) has been a staple with alpinists and outdoor enthusiasts for years. From freezing belays to snowy mountaintop ascents, it has kept adventurers warm and protected since its debut in 1992, with its newest model carrying on the torch, offering even greater warmth and packability.

　　DAS stands for Dead Air Space, referring to the way in which the jacket traps air in two different densities of PrimaLoft Gold Insulation (top-notch stuff), which has been fused with aerogel technology to boost softness and warmth. Its 133g insulation runs throughout the jacket, with an extra layer of 40g insulation placed along areas that require more warmth.

　　We immediately noticed, and appreciated, the DAS Parkas stellar weather resistance in light precipitation and heavy winds. Its 10-denier Pertex Quantum Pro shell is treated with a polyurethane dry coating and a hefty DWR finish. Its not a rain jacket by any means, but moisture beads up and runs off the jacket well, and you feel kind of invincible in wild gusts of wind.

　　Negatives? Its quite heavy, at 19.6 ounces, and doesnt pack as small as we would like into the large included stuff sack. One of our testers friends thought it was actually their sleeping bag while unpacking from a particular trip.

　　We also found the front pockets to be somewhat annoying. They are quite shallow and dont extend to the bottom of the jacket like the internal dump pockets do. This could be for easier use while wearing a harness, but we thought it was harder than usual to warm our hands in them when the temps plummeted, or store a bunch of stuff while on the go.

　　All in all, this is still one of the best synthetic insulated jackets you can buy for epics in the alpine, or nippy winter temps around the campfire. Its a legacy piece from a quality brand that just keeps delivering.

　　$449 at Patagonia Mens$224 at Patagonia Womens$225 at Backcountry Mens Lightest Synthetic Jacket Enlightened Equipment Torrid Jacket Specs Insulation 2 oz/yd² CLIMASHIELD APEX insulation Weight 8.2 oz. (size medium, 7-denier inside and outside fabric, standard torso, standard hood) Key features Zippered handwarmer pockets, no sewn-through seams, shock cord adjustment at the hem, and elastic cuffs Pockets 2 (Two zippered handwarmer pockets) Shell Fabric 7, 10, or 20 denier options for both inside and outside fabric

　　Pros Fully customizable Phenomenal warmth-to-weight ratio Packable Cons Long lead times for custom orders Fabric not super durable Boxy, unflattering look Chris Carter Here it is — the gold standard of lightweight warmth, and what seems like every ultralight thru-hikers jacket of choice for their pilgrimage on long trails. The Torrid Jacket ($200) is a king in the world of synthetic insulation. Starting at just 6 ounces, most elements of the Torrid are customizable and can be altered to fit each persons unique style and goal.

　　Who would have thought that down jackets would slowly be knocked off the backpacking pedestal by a synthetic piece from a small (though not so much anymore) company in Minnesota? Made with premium CLIMASHIELD APEX insulation, the jacket is almost see-through but somehow traps heat like a beast. No sewn-through seams eliminate cold spots, and a shock cord adjustment at the hem and elastic cuffs seal in warmth.

　　One of the authors of this guide wore a single Torrid for the duration of an 8-month thru-hike of the CDT and AT, and it retained its loft, warmth, and stitching the entire time. While its designed as a three-season layer, it was put through its paces in freezing whiteouts in the San Juans, and winter squalls through the Smoky Mountains.

　　Often paired with a fleece midlayer or rain shell, it kept him plenty toasty. Since its synthetic, it also retained its warmth during weeks of dreary rain when nothing stayed dry.

　　Can there be cons to such a jacket? Well, the 8.2-ounce weight (7-denier outer and inner fabric with hood) of the Torrid we tested comes with a pretty steep cut in durability. You dont want to battle off-trail with this thing. It also isnt form-fitting at all (designed to be layered underneath), with a basic, boxy design. Its not the stylish Arcteryx jacket you love wearing around town.

　　Regardless, if you are looking to minimize base weight without sacrificing warmth for an epic journey across the country, or occasional fast and light forays in the woods, its one of the best synthetic insulated jackets youll find.

　　Check Mens Price at Enlightened EquipmentCheck Womens Price at Enlightened Equipment Best Active Insulation Synthetic Jacket Black Diamond First Light Stretch Hoody Specs Insulation Migration-resistant PrimaLoft Gold Active Insulation Weight 14.3 oz. Key features Body-mapped insulation, underarm gussets for better range of motion, light and packable Pockets 3 Shell fabric 20D nylon ripstop with PFC-free DWR coating

　　Pros Highly breathable Great for start-stop activities like climbing and backcountry skiing Phenomenal mobility for active use Cons Some premature pilling Not the warmest out there Chris Carter We adored our original First Light Stretch Hoodies at GearJunkie, so when we read that the fit and overall design has been entirely overhauled for 23 — we had some trepidation. Dont fix what isnt broken! Well, after a proper season of big wall battles in Yosemite, some alpine romps in the Cascades, and months of abuse at our local Chattanooga crag, our fears were put at ease. The First Light Stretch ($295) is back, and well confidently say its better than ever.

　　This active mid layer has been a staple for backcountry alpine climbs, winter cragging, and blustery ski touring with its breathable four-season insulation and stretchy silhouette. Black Diamond describes this jacket as the ideal start-stop piece, providing warmth when you need it, and airy breathability when you dont.

　　This sounded just about perfect for Senior Editor Chris Carter, who wore this layer more than anything else on a recent fall ascent of El Cap. Whether huddling with his partner in frigid squalls at uncomfortable hanging belays or pulling hard on endless hand jams, the First Light kept him at a cozy homeostasis through all manner of chilly conditions and activity levels. Hes convinced this is the crème de la crème of active insulation comfort.

　　A few notable upgrades from this jackets previous iteration make it an even more potent tool for the active adventurer than before. Where once was silver, there now is gold — and PrimaLoft Gold Active insulation is hard to beat. It breathes efficiently and stretches with each movement, but somehow traps an absurd amount of heat when static. Body-mapped insulation along the body, shoulders, and arms packs more heat in targeted zones, and allows greater breathability in areas that need it most.

　　The update also culls a few ounces from the last model, but seems to be a warmer layer than before. It also packs up small into a zippered hand pocket and easily clips to your harness. A cherished feature that is often eschewed on synthetic jackets.

　　While we were pleasantly surprised with this new design in most areas, a few cons did surface. Durability was a standout feature of prior models, but we noticed some premature pilling with this iteration, and a good number of picks and frays after just a handful of trips, and were scared a bit of tenacity was sacrificed when cutting weight.

　　Now granted, these trips included shoving our bodies up sharp granite chimneys, bushwhacking through briers, and taking a few spicy lead falls on rough slabs — so theres a chance were being too critical. But, for a jacket thats designed for technical mountain terrain, we would like to get several seasons out of it at least.

　　Also, if youre looking for a jacket that offers the greatest weather/wind resistance, this isn’t the one for you. It insulates fine, but heavy gusts cut through it easier than others. Pair it with a light windbreaker, though, and its a power combo in heinous wind.

　　For start-stop activities where ventilation is needed while cranking hard, and warmth is required when static, the First Light Stretch Hoody is about as good as it gets. It wont keep you as warm as others on this list but is a phenomenal technical layer for missions that have you constantly on the move.

　　Need even more breathability? Check out the similar First Light Hybrid (also reswizzled in 2023), which features breathable Merino insulation on the back panel and sleeves. While this wont keep you near as warm, it boosts the A/C during those awkward shoulder-season temps where the weather just cant make up its mind. And, the soft breathable back panel makes it a prime pick for backpacking.

　　$295 at REI Mens$275 at REI Womens$295 at Black Diamond Equipment Womens Best of the Rest Patagonia Nano Puff Specs Insulation 60g PrimaLoft Gold Eco synthetic insulation Weight 11.9 oz. (men’s medium) Key features Comfortable front zipper garage at chin, elasticated cuffs, stuffs into its own chest pocket, drawcord-adjustable drop-tail hem Pockets 3 (Two zippered handwarmer pockets and one internal chest pocket which doubles as a stuff sack with a harness attachment loop) Shell Fabric 1.4 oz. 20-denier 100% recycled polyester ripstop with a DWR finish

　　Pros Stylish design looks good in the mountains and around town Highly compressible given how warm it is Slippery fabric makes layering easy Cons Extensive stitching adds some breathability but also allows rain to soak insulation faster A little heavier than similar lightweight layers Loose-fitting cuffs often let some heat escape Chris Carter An absolute classic, the Patagonia Nano Puff ($239) is probably the most recognizable synthetic jacket on the market. As one of the first jackets to offer premium synthetic insulation with a lightweight but durable design, it has a heritage unlike many in its category.

　　It features a stylish design that looks good around town, yet boasts surprising warmth and durability, making it a reliable layer for the backcountry. The versatility of this piece contributes to its reputation, and the newest model definitely stays true to its legacy.

　　The Nano Puff delivered middle-of-the-road results and proves to be a solid do-it-all jacket despite not being the lightest, warmest, or most breathable option out there. It has a pretty competitive warmth-to-weight ratio, though if you need a super warm puffy for winter pursuits, this isn’t the one for you.

　　This model performs well in shoulder season adventures, or as part of your layering system for colder forays in the mountains. The PrimaLoft Gold Eco insulation used in the current model does deliver impressive warmth for how thin it feels and does a great job of retaining its insulating properties when wet.

　　The Nano Puff is somewhat breathable given the amount of stitching it has, but the solid sheet lining limits airflow, and feels pretty clammy when sweat builds up. This reduces ventilation, but does help with wind resistance when temps start to drop. Its slim design and premium insulation make it one of the more compressible synthetic jackets out there, which is one of the areas it shines the most.

　　If you need maximum warmth for chilly adventures or lightweight breathability for fast and light missions, this probably isn’t the jacket you want. However, as a functional yet stylish crossover layer for use around town, or deep in the mountains, the Nano Puff remains one of the best synthetic insulated jackets out there.

　　$239 at REI Mens$239 at REI Womens$239 at Patagonia Mens$114 at Patagonia Womens Rab Xenair Alpine Light Jacket Specs Insulation 60gsm Primaloft Gold Insulation Active+ through front, back, top of sleeves, and collar; 40gsm Primaloft Gold Insulation Active+ through sides, underarms, spine, and top of hood Weight 10.3 oz. (men’s medium) Key features Under helmet hood, elasticated gusset at cuffs, stuffs into its own chest pocket, body-mapped insulation to aid in breathability Pockets 3 (Two concealed zippered handwarmer pockets and one internal chest pocket which doubles as a stuff sack with a harness attachment loop) Shell Fabric 20 denier Pertex Quantum Air nylon with a DWR finish

　　Pros Super breathable Lightweight Durable Packs down small Cons Hood design makes wearing it under a helmet a little awkward Not the warmest jacket out there Chris Carter Rab has done it again! Ticking all the boxes of a solid active insulator, the Xenair Alpine Light Jacket ($225) is breathable yet warm, and crazy comfortable, per Rabs long-standing reputation. For start-stop activities in mixed conditions where stellar breathability is needed, but warmth is also a concern, this jacket stands out as a quality layer for the dedicated outdoor athlete.

　　The jacket has thoughtful features, but retains a sleek, stylish look. Raised zippered handwarmer pockets accommodate backpack hipbelts, and an internal zippered pocket doubles as a stuff sack. Soft elastic cuffs and a single hem adjustment help maintain warmth and reduce cold spots.

　　The hood is elasticated on the front and back, ensuring a snug fit, but did give us some issues when worn under a climbing helmet (as it isn’t quite big enough to fit over one). When wearing it under a helmet, the elastic banding, flat front brim, and slippery fabric caused the hood to often cover our eyes and obscure our vision when looking up or side to side.

　　One of the most notable features of the Xenair is its breathability. It regulates temperature and deals with moisture buildup with ease. Rab has thrown a good deal of cutting-edge technology into this jacket, including two densities of PrimaLoft Gold Active+ synthetic insulation, some of the warmest, most breathable insulation on the market, combined with a weather-resistant, permeable Pertex Quantum Air outer fabric.

　　This allows for maximum warmth, while greatly reducing moisture and vapor buildup. Additionally, two weights of insulation are strategically mapped around the body, with lighter, more breathable insulation placed on areas of the body, such as the underarm and center back, that require more ventilation.

　　For the active mountain athlete looking for a lightweight, breathable midlayer for colder climates, or a standalone outer jacket for summer pursuits, the Rab Xenair Alpine Light Jacket may just be the perfect option.

　　$225 at REI Mens$101 at Backcountry Womens Stio Dawner Hooded Jacket Specs Insulation Octa Lightweight Knit Insulation, 100% Polyester, 100g/m2 Weight 12.2 oz. Key features Octa insulation has a slightly raised diamond grid pattern that holds in heat while allowing sweat to evaporate Pockets 3 (two zippered handwarmer pockets with left pocket functioning as a stuff sack, one zippered chest pocket) Shell fabric Stretch Nylon Plainweave with High Air Permeability, 91% Nylon, 9% Spandex, 20 denier, 55 g/m2 with a PFAS-Free DWR Finish

　　Pros Lightweight Very breathable Excellent range of motion Packs into its own pocket Simple, classic style Cons Textured lining can catch on other clothing layers Not as warm as heavier jackets Chris Carter The Stio Dawner Hooded Jacket is a lightweight, breathable hoody with a great range of motion, making it ideal for high-output activities where heat and moisture control are critical. We also like the simple, classic style that will look equally at home on the trails or around town.

　　The highlight of this jacket is the Octa Lightweight Knit Insulation that has a three-dimensional diamond grid pattern. This material feels very soft and comfortable against the skin, and does a great job trapping heat, making the jacket surprisingly warm for its weight. The stretch nylon shell material has good air permeability and a DWR finish that helps repel light rain or mist. We also like how the relaxed fit keeps you comfortable in a wide range of conditions and activities.

　　Our only minor complaint about this jacket is that the outer shell material and the inner lining material (the Oct Lightweight Knit Insulation) are only sewn together at the jackets seams. This, along with the three-dimensional texture of the lining, can cause the material to bunch up and catch on other clothing layers. This was less of an issue while wearing tighter-fitting technical base layers, but was more noticeable when wearing the jacket over a thicker layer like a flannel shirt.

　　Overall, we really like the style, fit, comfort, and warmth to weight ratio of the Stio Dawner, and plan to keep it on our back or in our pack for fast and light shoulder season adventures.

　　Check Price at Stio Patagonia Micro Puff Hoodie Specs Insulation PlumaFill Weight 10 oz. (men’s medium) Key features Helmet-compatible hood, elasticized cuffs, stuffs into its own pocket, plentiful zippered and drop-in pockets Pockets 4 (two welted, zippered handwarmer pockets and two internal drop-in pockets; left pocket doubles as a stuff sack with a reinforced carabiner clip-in loop) Shell fabric 10-denier Pertex Quantum 100% nylon ripstop with a DWR finish

　　Pros Lightweight Quite wind-resistant for its weight Versatile Cons Expensive compared to similar options Minimal stretch Shell could tear easily Chris Carter Patagonia’s Micro Puff Hoodie ($329) has drawn accolades and awards from users and media since its release in September 2017. Though the price point is on the higher end, the Micro Puff Hoodie is the perfect just-in-case insulating layer thats barely noticeable in the pack.

　　The 10-ounce Micro Puff Hoodie kept us warm during moderate-level activities down into the 30s with just a base layer, and it was surprisingly wind-resistant for such a light garment. Consequently, though, breathability is on the lower side.

　　The DWR treatment is exceptional and continues to bead water after a few wash cycles. The fit is snug, and the sleeves keep our wrists covered — except when our 34.5-inch arms are overhead.

　　A lack of stretch and the just-to-the waist torso length allows a little gapping during long reaches. The jacket is very compact, and the slick outer surface makes it ideal for layering underneath shells or heavier layers.

　　Stuffing down to about the size of a cantaloupe, the Micro Puff Hoodie fits into a handwarmer pocket with a clipping point. This ability, combined with the best-in-class warmth-to-weight ratio of Patagonia’s PlumaFill, makes it a great insulator we are always throwing in our packs.

　　The Pertex Quantum GL face fabric proved durable during the test period but does require care, as the wispy fabric is prone to tearing on sharp objects. This shell may not hold up well to brutal bushwhacking or scrambling over sharp rocks in the alpine compared to some of the others.

　　However, the lightweight, wind-resistant versatility of the Micro Puff makes it ideal for adventurers who need reliable warmth without sacrificing space or weight in their pack. Its one of the best synthetic insulated jackets out there.

　　For more, check out our full Patagonia Micro Puff review.

　　Check Mens Price at PatagoniaCheck Womens Price at Patagonia Arc’teryx Atom AR Hoody Specs Insulation Arc’teryx Coreloft Insulation Weight 1 lb. Key features Athletic fit, helmet-compatible hood, two zippered hand pockets, one zippered chest pocket Pockets 3 Shell fabric Tyono 30-denier shell with DWR treatment, 100% nylon

　　Pros Relatively breathable for such a warm jacket Stylish Durable Exceptionally warm Cons Runs a bit small No internal dump pockets Chris Carter The Arc’teryx Atom AR Hoody ($350) has been a favorite of ours for higher-elevation rock climbing for many years. With every new mission, it proves to be a reliable synthetic middle and outer layer.

　　When the winter mountain forecast is just short of arctic, the 1-pound (men’s medium) Atom AR (All Round) goes into the pack, and — surprisingly for Arc’teryx — the pricing is competitive. Given its stellar warmth-to-weight ratio, durability, and value, we’ve awarded this layer the best overall jacket for low-output activities.

　　While testing this jacket, we found the fit to be comfortably close, which makes it layer well under shells while still allowing layers underneath. The articulated sleeves, underarm gussets, and elastic-paneled cuffs keep our wrists covered in all arm positions and reaches. The torso length is on the shorter side, however, which makes the lower hem rise above our waist during reaches overhead.

　　The cuff dimensions are on the smaller side, which seals tiny wrists well, with just enough stretch to be pushed a few inches up the forearms. The front of the collar zips up to cover the mouth, and the single-adjust hood is just big enough for a climbing helmet. This jacket serves well as a belay jacket, but we would like at least one internal dump pocket to dry gloves.

　　The DWR (Durable Water Repellent) coating has proven extremely durable over the seasons and continues to bead water long after some of its competitors’ coatings. The Atom AR compresses to about the size of a volleyball and is exceptionally warm given how breathable it is.

　　While it’s not the lightest nor the most breathable jacket we tested, if you’re looking for a great do-it-all layer to throw into the pack where functionality and warmth are a primary concern, look no further than the Arc’teryx Atom AR Hoody. We think its still one of the best synthetic insulated jackets on the market.

　　$350 at REI MensCheck Womens Price at Arcteryx Mammut Rime Light IN Flex Specs Insulation 60g Toray stretch insulation Weight 12.8 oz. Key features Zippered front pockets are compatible with pack straps and climbing harnesses, elastic cuffs, adjustable hem Pockets 2 Shell fabric 20-denier Pertex Quantum Air

　　Pros Very warm for an active midlayer Thoughtful features Cons A bit bulky Chris Carter The Rime Light IN Flex ($249) has a very snug fit when still, but class-leading elasticity allows free movement. The sleeves and lower hem are a tad short for overhead reaches, but the fit around the shoulders feels ample regardless of arm movements.

　　The Rime Flex is on the warmer and bulkier side of the active insulation category. The Pertex Quantum Air shell and OTI Stretch insulation provide breathability and warmth that works well for loaded hiking down to the upper 20s.

　　It keeps you warm during breaks, even in moderate winds. The jacket still performed well into the 30s as long as the main zip was vented. We found it excellent for lounging into the lower 50s.

　　The Rime Flex has two handwarmer pockets in the high position, an adjustable lower hem, dual-zipper pulls, and an insulated helmet-compatible hood.

　　For the space-conscious hiker focused on an ultralight setup, this may not be the best choice, but if you are looking for maximum warmth without sacrificing breathability, the Rime Flex is a solid pick.

　　$249 at REI Mens$162 at Backcountry Womens Helly Hansen Odin Stretch Hood Insulator 2.0 Specs Insulation PrimaLoft Gold Active+ Weight 1 lb. Key features 2-way stretch fabric, DWR coating, flat brim hood Pockets 3 (Two zippered handwarmer pockets and one internal chest pocket) Shell fabric 100% Polyamide (shell 1); 95% Polyester, 5% Elastane (shell 2) with a DWR coating

　　Pros Breathable but durable face fabric and insulation Stellar mobility while climbing or hiking with articulated elbows Vented underarms Extremely comfortable lining fabric Cons On the heavy side Niche, performance-oriented design isnt for everyone Chris Carter If its going to be named after the Norse god of war, it had better be a stalwart layer. After a season of putting a number of Helly Hansens Odin collection through technical mountaineering trips, long multipitch climbs, and extended backpacking trips, wed say these pieces truly live up to their name. The Odin Stretch Hood Insulator 2.0 ($260) is one of the models we had the pleasure of testing, and for full-on backcountry missions in brutal conditions, its up there with the best of the best.

　　For a jacket specced out with so many pro features, it boasts a surprisingly approachable price point. Performance-oriented details like a flat-brimmed contoured hood, articulated elbows, wide elastic cuffs, and ventilated underarms make this a power player in the mountains, without the sticker shock of other high-end jackets.

　　Helly Hansens Odin collection was tested by Search and Rescue and mountain guides from around the world, and was built to handle demanding mountain terrain in the most gnarly conditions possible. These pieces are vetted and trusted by professionals on a global scale — and it shows.

　　The Stretch Hood Insulator is a bit warmer and thicker than Black Diamonds First Light Stretch Hoody, our top pick for breathability, but still regulates temperature fine, and responds well when you pick up the pace. The ventilated pits, permeable polyamide shell, and inherently breathable nature of PrimaLoft Gold Active+ join forces to keep you cozy in moderate activity, but appropriately warm when you slow down.

　　The fit is slightly athletic, without being too form-fitting to limit layering underneath. As a bulkier/warmer jacket than others on this list, we like to pair this with a thin fleece underneath, and a windbreaker, softshell, or hardshell overtop to form a truly formidable barrier against rain or heavy wind.

　　Our favorite feature? The silky smooth, stretchy lining fabric has the best next-to-skin comfort weve tested in a while. Though we usually have a base layer underneath, the almost fleece-like lining had us throwing this on over our T-shirts around camp, and even sleeping in it without a shirt on. Its that cozy.

　　We wish the weight was a bit lower, that it had an over-the-helmet hood, and that it packed into one of its pockets for convenient transport on a harness, but aside from a few grumbles, this jacket is one of the very best synthetic pieces we tested in 2024. It moves and breathes with you as you contort your body on desperate winter rock climbs or parkour over boulder-strewn river beds, but hunkers down and keeps you surprisingly warm when static. For the active mountain athlete needing a premium, mega-comfy insulating layer at a respectable price — look no further.

　　Check Mens Price at Helly HansenCheck Womens Price at Helly Hansen Synthetic Insulated Jacket Comparison Chart

　　Synthetic jackets tend to be more breathable and versatile, making them perfect for activities like multipitch climbing; (photo/Honey McNaughton) How We Tested Synthetic Insulated Jackets The GearJunkie team has been huddling together in shiver bivies, tugging on tiny granite crimps, and slogging along skin tracks in synthetic jackets for just about forever. When we say weve exhaustively sampled the markets selection — we mean it. No stone was left unturned in the creation of this roundup, and each jacket had to pass a series of demanding tests to merit any real estate in this guide.

　　Editor-at-Large Seiji Ishii curated our initial selection of 11 jackets for this guide in January 2020. A prolific climber, hiker, and all-around outdoorsman, Seiji has spent many a mile roughing it out in these synthetic puffies, and knows the importance of a solid jacket in the backcountry.

　　Author and Senior Editor Chris Carter took over this guide in August of 2022, and has been combing through his closet, and scouring the internet ever since to bring you the most current, deserving selection possible. As an ultralight thru-hiker and endurance backpacker, the functionality-to-weight ratio of each item he carries on his back is of utmost importance, and every element of the gear he packs is considered.

　　Chris has thru-hiked the Triple Crown of long trails (the Appalachian Trail, Pacific Crest Trail, and Continental Divide Trail) and continues to pursue long-distance hiking around the world.

　　Hes had the chance to test a range of different synthetic jackets on these trails and has found synthetic insulation to be the best choice for versatility, breathability, and weather protection on long journeys. He knows what makes a synthetic jacket worth its mettle for different adventures, and has been fastidiously choosy about what ends up in this guide.

　　We know the competition for the synthetic podium is fierce and constantly evolving, which is why weve slotted this guide into a regular update schedule. As soon as fresh technology or new designs hit the market — were scoping them out, testing them in the wild, and deciding whether they deserve attention. Rest assured, every jacket in this guide has been vetted by our stone-cold pros and has proven to be worthy.

　　Senior Editor Chris Carter putting the EE Torrid through its paces in the snowy San Juans on the CDT; (photo/Chris Carter) Buyers Guide: How to Choose a Synthetic Insulated Jacket Synthetic insulation has become a popular alternative to down over the years, and the market now offers a wide range of high-quality synthetic-filled jackets. On this list, some of our recommendations highlight puffy jackets that prioritize warmth, while others are best used during high-output activities like running or skiing where breathability is key.

　　Synthetic midlayers that focus on warmth stress thermal efficiency for lower-output activities such as walking, belaying, fishing, and so on. Puffy synthetic midlayer jackets prioritize maximum warmth over breathability.

　　On the other hand, active insulation jackets offer more breathability for high-output pursuits such as backcountry skiing, jogging, and climbing. Synthetic jackets designed for active use are more breathable and better at regulating temperature.

　　Beyond these two broad categories, there are many other factors to consider as you narrow down your synthetic jacket search. In this buyers guide, we aim to prepare you to make an informed and confident purchase.

　　What Is Synthetic Insulation? Synthetic insulation is designed to replicate the qualities of down. Its made from polyester fibers arranged into intertwined filaments that trap warm air in millions of tiny pockets.

　　Compared to down jackets, synthetic insulated jackets have both pros and cons. Importantly, synthetic insulation is able to retain its warmth when wet. This is a huge advantage over down and a key reason why synthetic insulation is often preferred in wet and cold environments.

　　Warm yet breathable, active insulation jackets like the Arcteryx Atom LT are perfect for cold ascents at the crag; (photo/Honey McNaughton) Unfortunately, synthetic insulation cannot quite match the miraculous warmth-to-weight ratio of down. In other words, synthetic jackets need to be a little heavier to achieve the same level of warmth.

　　There are many different types of synthetic insulation on the market now, and various companies have their own proprietary types of insulation that they either fill their own jackets with or sell to other companies. A few of the most common types of insulation are PrimaLoft, Thinsulate, and PlumaFill.

　　PrimaLoft, one of the most widely used types of synthetic insulation, is made with 100% polyester microfiber that mimics the fluffiness of natural down, and comes in a few different categories. The most popular are PrimaLoft Gold, PrimaLoft Silver, and PrimaLoft Silver Eco (which is made of 70% recycled fibers).

　　PrimaLoft Gold is the most performative and sought-after insulation in their lineup, and is comparable to a 550-fill power down jacket. Each of the categories, to varying degrees, is highly breathable, water-resistant, and compressible.

　　Rocking the adequately breathable Torrid through mid-May snow on a thru-hike of the CDT; (photo/Chris Carter) Durability Durability is particularly important if you plan to wear your jacket as an outer layer in rough and rugged environments. Most jackets on this list stand up great to the rigors of bushwacking or climbing on rough rock. But some need a bit more care than others.

　　The durability of synthetic insulation versus down insulation is somewhat of a debated topic, as there are a number of factors to consider. Synthetic insulation doesn’t have to be babied as much as down insulation, but also loses its form and breaks down faster over time, especially if you are compressing the jacket a lot. Down tends to leak from the jacket more, however, and therefore slowly loses its warmth.

　　Not all synthetic insulation is created equal, though, and the different types of insulation will vary in how long they hold up to harsh conditions. When thinking about the durability of a jacket, the type and quality of the insulation (such as PrimaLoft Gold versus PrimaLoft Silver) and the construction of the outer shell (such as what denier and material is used) need to be taken into consideration.

　　A durable synthetic jacket is key for cold night romps up sharp rock; (photo/Chris Carter) Additionally, it’s important to remember that often the more durable a jacket is, the heavier it is. So, if an ultralight setup is your main concern, you may need to go with a more fragile layer.

　　A shell like the Patagonia DAS Parka offers increased durability, but may weigh your pack down too much for quick missions in the mountains. If you want to thrash about without concern, something like the thinner Patagonia Micro Puff Hoodiemay not be the best choice, but could lend itself as the optimum layer if light and fast is your main goal.

　　Water Resistance Where synthetic insulation really trumps down is in its ability to insulate when wet. Down absorbs water, and clumps up, thereby losing its loft, as opposed to synthetic insulation which retains its loft. Water sits between the fibers, allowing the insulation to keep its shape, maintain warmth, and dry faster than down.

　　While all synthetics will generally repel moisture better than down, the degree to which a jacket will insulate you in damp conditions varies from brand to brand. Most manufacturers are adding a DWR (Durable Water Repellant) treatment to the outer shell of their insulated jackets, which beads up water in light precipitation, allowing it to roll off and not soak into the insulation. This only works to a certain degree, however, and in constant rain, you’ll want to add a rain jacket to your layering system.

　　A primary selling point of synthetic insulation: reliable warmth when the weather takes you by surprise; (photo/Emily Malone) Pack Size Sure, you plan to wear the jacket, not just pack it around. But for those times you need to ditch a layer or bring it just in case, the pack size and weight matter. Synthetic insulation doesnt tend to pack as small as down (although synthetic fill technology is rapidly improving).

　　While the Patagonia Micro Puff may not be the most durable jacket, it wins big on the packable scale. The Rab Xenair Alpine Lightand the Stio Dawner Hooded Jacket are other easy-to-pack choices.

　　Key Features: Pockets, Hoods, and More Depending on your intended use and general needs, youll want to choose a jacket with the right array of features.

　　Pockets, hoods, adjustable hems, and elastic cuffs are all examples of common synthetic jacket features. Each of these has a unique purpose and value.

　　Pockets come in a wide range of sizes and shapes. From zippered hand-warmer pockets to low-profile chest pockets, the recommended jackets on this list offer a wide range of configurations.

　　The Patagonia DAS Parka excels in freezing temps and has features catered toward rock climbers and alpinists; (photo/Honey McNaughton) Many synthetic jackets are available in either a hoodie or non-hoodie style. The best choice for you depends on your use. Hooded jackets are great in frigid or stormy conditions and for people who tend to feel cold in the ears, head, and face. Unhooded options are generally best for everyday use around town or in-bounds resort skiing.

　　Price and Value At the end of the day, you want to get a good deal. More than just the lowest price tag, a jackets value stems from its usefulness and bang for the buck.

　　Carefully consider how youll use your jacket and then look for features that fit your needs. Helmet-compatible hoods, pockets, and materials become important considerations.

　　Also, if you plan to wear your jacket regularly, its worth investing more. Spending a few extra bucks now will afford you many seasons of warmth and comfort outdoors.

　　On the lower end of the spectrum, budget picks like Cotopaxi Teca Cálido hover in the $150-200 range. These jackets will get you around town, and perform about average on light adventures, but wont have the same level of mobility, breathability, and performance as pricier models in the $250-300 range — such as Black Diamonds First Light Stretch Hoody, or Arc’teryxs Atom Hoody. These will last for years of abuse and will help regulate temperature while keeping pack weight down on truly technical backcountry missions.

　　Consider the full range of conditions you plan to encounter on your trip, and choose a jacket that will hold up to whatever you plan on putting it through.

　　The revolutionary EE Torrid fits perfectly with an ultralight backpacking setup, keeping pack weight to an absolute minimum; (photo/Emily Malone) FAQ What are synthetic jackets used for? Synthetic jackets are used in all sorts of situations where comfortable and reliable warmth is needed. From the ski hill to the jogging path, synthetic jackets are a modern and effective tool in the fight to stay warm.

　　Compared to down jackets, synthetic jackets tend to be slightly heavier and less vulnerable to moisture-related warmth loss. Elite mountaineers use synthetic jackets, as do city dwellers on their way to buy groceries.

　　On this list, weve divided our recommended jackets into two unique categories. For maximum warmth, check out our synthetic insulated jacket category. If youre looking for a jacket that can regulate your temperature and breathe during active use, check out our active insulation category.

　　While synthetic jackets may not be as light and packable as down jackets, they dont have to be babied quite as much; (photo/Heather Rochfort) Whats the difference between synthetic and down? Compared to down, synthetic insulation is slightly heavier, slightly cheaper, and less likely to lose its effectiveness in a rainstorm. Unlike down, synthetic insulation is able to retain its warmth when wet.

　　When dry, however, synthetic insulation cannot quite match the miraculous warmth-to-weight ratio of down. In other words, synthetic jackets need to be a little heavier to achieve the same level of warmth.

　　Do I need a synthetic jacket for skiing? Many skiers wear synthetic insulated jackets as a midlayer beneath their waterproof outer shells. On cold days at the resort, a warm and puffy jacket can be the difference between comfort and misery.

　　For backcountry skiing, breathable layers are the way to go. During uphill hikes along the skin track, youll want layers that can let some of your body heat escape in order to stay cool and prevent sweating.

　　A reliable active insulation synthetic jacket offers warmth and breathability during high-output activities; (photo/Honey McNaughton)

　　The Best Down Jackets of 2024 We found the best down jackets of 2024. From ultralight backpacking jackets to budget-friendly everyday puffy jackets, weve got you covered.

　　The Best Fleece Jackets of 2024 Durable and timeless, fleece is an outdoor staple. Looking to upgrade your fleece game? Weve got you covered with our list of the best fleece jackets in 2024.