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The Best Backpacking Water Filters of 2024
The Best Backpacking Water Filters of 2024
Nov 5, 2024 8:51 PM

  You don’t need much to have a successful backpacking trip.Yes, you’ll need some gear (like a tent, asleeping bag, and apack). But most importantly, you’ll need a way to get clean, safe water while on the trail.

  Before we explain in depth how each water filter works, here are a few things that will help you through this guide. There are many different methods of filtering (or treating) water. The most common methods are through a cartridge or tube, with either activated carbon, UV light, or chemicals.

  Filters also come in different styles: straw-style, pump filters, gravity filters, and UV or tablet treatments. They all make water safe to drink but differ slightly in size, durability, and price.

  We’ve spoken to thru-hikers, hunters, and mountaineers, and read hundreds of customer reviews to find out which water filters on the market are truly the best.

  Our team collectively tested a plethora of diverse filters for the creation of this guide. Current author and Senior Editor Chris Carter has been squeezing water through countless tubes and dropping tablets in his Nalgene each season to bring you the streamlined selection of 18 filters you see today. From stagnant green pools in the African savanna to bubbling alpine brooks in the Cascade Mountains, Chris has filtered water of all consistency and color in the wild and brings only the best filters on his excursions. Rest assured, we would trust every model in this guide to keep us safe and hydrated in the backcountry.

  Be sure to check out ourwater filter comparison chartat the bottom, our comprehensivebuyer’s guide, or ourFAQsection for help in snagging the best backpacking water filter for your adventure.

  Editor’s Note: We refreshed this article on April 23, 2024,adding the Lifesaver Wayfarer as the best pump-style model in our selection of the best backpacking water filters.

  The Best Backpacking Water Filters of 2024 Best Overall Backpacking Water Filter: Sawyer Squeeze Best Budget Backpacking Water Filter: LifeStraw Personal Best Backpacking Water Filter for Thru-Hiking: Katadyn BeFree 0.6L Best Water-Purifying Tablets: Katadyn Micropur Best Gravity Backpacking Water Filter/Best for Groups: Katadyn BeFree Gravity 3L Best Backpacking Water Filter Pump: Lifesaver Wayfarer Best Backpacking Water Filter Bottle: GRAYL GEOPRESS Bottle Best Overall Water Filter Sawyer Squeeze Specs Weight 2.5 oz. Filter type Bottle/inline filter Filter life Lifetime warranty Flow Rate 1.7 L/min

  

The Best Backpacking Water Filters of 20241

  

The Best Backpacking Water Filters of 20242

  Pros Easy to use Lightweight Packable Cons Included pouches aren’t very durable Chris Carter This water filter system is the gold standard for many thru-hikers and backpackers across the globe. The Sawyer Squeeze filters down to 0.1 microns, making it effective against bacteria and protozoa (thus, slightly more effective and safer than other filters).

  It has a great flow rate and comes with a kit to attach to a hydration bladder as well. Thanks to the combination of price and weight, it earns the distinction as the best backpacking water filter.

  The Sawyer Squeeze has over 1,000 five-star ratings. Top feedback from customers includes the ultralight trail weight, the ease of use (specifically the reusable roll-up squeeze pouch), and the durability over time.

  Many customers love that there are no annoying tubes — you just screw the filter onto the squeeze bag or a bottle (Smartwater bottles work best), and drink. For overall ease of use and durability, this filter has earned its place at the top of the list.

  $41 at REI$46 at Amazon Best Budget Water Filter LifeStraw Personal Specs Weight 1.6 oz. Filter type Straw filter Filter life 4,000 L Flow Rate N/A

  

The Best Backpacking Water Filters of 20243

  Pros We love this filter for daily adventures and as a backup filter method on longer trips It lasts for up to 4,000 L, which is plenty for almost any outdoor adventurer Cons It doesn’t work for filtering water into a bladder or bottle for reserve (you have to drink as it filters) You’ll also have to remember to empty the fiber chamber to prevent clogging before storing it away Chris Carter The LifeStraw Personal is one of the most consistently high-rated water filters of all time. The simple straw-style filter uses a hollow-fiber membrane that filters out bacteria, protozoa, and microplastics down to 0.2 microns (the standard for water filters). It’s also the lightest on the market at 2 ounces and costs only $20.

  That said, it’s only good for drinking water directly from the source and doesn’t work for filtering larger quantities into bottles, so it definitely has its limitations. For long-distance backpacking, you’ll probably need a secondary water filtration method. But it’s a great budget pick and solid option for emergency kits, backpacking, hiking, bugout bags, or international travel.

  The LifeStraw works great, whether you’re going on a day hike or a month-long backcountry excursion. Our reviewers especially liked how easy it is to pack and carry, and we appreciate the clear taste on output.

  For the ultra-minimalist, or the backpacker who wants an easy-to-use option they can pull straight from an outer pocket of their pack, the LifeStraw Personal is a must-have.

  $16 at Amazon Best Filter for Thru-Hiking Katadyn BeFree 0.6L Specs Weight 2.3 oz. Filter type Bottle filter Filter life 1,000 L Flow Rate 2 L/min

  

The Best Backpacking Water Filters of 20244

  Pros Fast flow rate Lightweight Easy to clean Cons Clogs up faster than some models Doesn’t fit as many water bottles as the Sawyer Squeeze Chris Carter To justify taking anything on an extended thru-hike it needs to be dependable, lightweight, and durable enough to last for months of torture. Today, you usually see one of two popular filters being used by long-distance hikers going the length of trails like the PCT and AT: the Sawyer Squeeze or the Katadyn BeFree.

  One of the authors of this guide has taken the BeFree on three different thru-hikes across America and has nothing but praise for this tiny ultralight wonder. At 2.3 ounces it barely registers in your pack, has a lifespan of 1,000 L, and a flow rate of 2 liters per minute, bumping it just ahead of the Squeeze and many others in the flow department.

  Its 0.1-micron microfilter allows you to confidently gulp down any water you encounter on a long trail (though the murky cow troughs in New Mexico on the CDT did have our tester filtering twice), and the high flow rate means you’re not wasting a bunch of energy just to get a sip in. The wide mouth of the flexible flask allows it to fill up in just a couple of scoops, and you can clean the filter by simply swishing water around in the flask.

  It’s not flawless, though. First, it isn’t as versatile as the Squeeze in that it won’t fit over standard water bottle mouths (this isn’t an issue if you plan to just use the included flask). Second, it tends to clog a little faster in filthy water than other filters, including the Squeeze.

  Those gripes aside, this is still the top pick for hundreds of long-distance hikers, and for good reason. If you’re looking for an ultralight filter with a solid flow rate for long adventures, don’t pass the BeFree 0.6L by.

  $40 at REI$39 at Amazon Best Water-Purifying Tablets Katadyn Micropur Specs Weight 0.9 oz. Filter type Chemical purifier Filter life 1 liter per tab Flow Rate 1 L/30 min.

  

The Best Backpacking Water Filters of 20245

  Pros Destroy bacteria, protozoa, and viruses Lightweight, budget-friendly, and easy to stash in a pack, pocket, or a first-aid kit Cons 4-hour wait time. (Because of this, we recommend treating your water ahead of time or in larger batches.) Expire after 5 years Chris Carter If you really don’t want to sacrifice weight for a filter, chemical treatment is a great option. Katadyn’s Micropur M1 tablets have been a top choice over the years, thanks to their purifying powers and easy-to-use instructions.

  Some claim there is a slight aftertaste, although we like these much better than other chemical treatments. Also, many users agree that learning the wait times is important. The tablets destroy viruses and bacteria in 15 minutes, but it takes 4 hours to kill the pesky cryptosporidium parasite.

  For backpacking trips, you can use tablets in the evening to ensure that you have clean water for the next day. These are also great options for trips where you’re operating out of a backcountry base camp for side excursions. Most filters have the potential to fail, so having a few of these tablets stashed away for emergencies is smart.

  $16 at REICHECK PRICE AT Amazon Best Gravity Water Filter/Best for Groups Katadyn BeFree Gravity 3L Specs Weight 6.8 oz. Filter type Gravity Filter Filter life 1,000 L Flow Rate 2 L/min

  

The Best Backpacking Water Filters of 20246

  Pros Requires no backflushing High flow rate Cons You’ll need a place to hang the filter (so if you’re traveling to beaches or deserts, this might not be the best option) Heavy Chris Carter Gravity filters use the force of gravity to pull water through the filter. For that reason, they’re extremely user-friendly. Just fill it with dirty water, hang it, and come back in a few minutes to find filtered water waiting in another container.

  They work great for larger groups or when you want to filter a lot of water all at once. They’re also quite light, given their speed and ease of use.

  At just 6.8 ounces, the Katadyn BeFree Gravity filter is the lightest gravity filter on this list. The Katadyn BeFree filters 3 L at a time and comes with a quick-connect output hose to easily fill multiple bottles, pots, or bladders.

  It also doesn’t require common filter maintenance like backflushing. Similar to the Sawyer Squeeze, the flow rate is great, and because the bag rolls down, it’s fairly packable.

  It came in behind the Sawyer Squeeze overall, largely because it’s more expensive. For those who don’t mind spending a little more or are traveling as a bigger group in the backcountry, this is definitely one of the best backpacking water filters available. It’s proven itself over many backpacking and hunting trips in the Rocky Mountains and beyond.

  The Katadyn BeFree system can filter smaller particles down to 0.1 microns. The majority of reviewers love that it’s both easy to use and clean.

  For more info, check out our full review of the Katadyn BeFree Gravity Filter.

  $75 at REI$70 at Amazon Best Backpacking Water Filter Pump Lifesaver Wayfarer Specs Weight 11.2 oz. Filter type Pump Filter life 5,000 L Flow rate 1.39 L/min.

  

The Best Backpacking Water Filters of 20247

  Pros Immediately filters water removing/killing all protozoa, bacteria and viruses Can filter 1,320 gallons/5,000 L before replacement Wont pump water once the membrane is blocked NSF/ANSI P231 rating Cons On the heavier side compared to other filter types More work to assemble and use than squeeze filter Chris Carter Standard water filters are great for removing particulates and eliminating bacteria, cysts, and parasites from water sources. But they don’t stop waterborne viruses. Pathogens like cryptosporidiosis (cryptosporidium), giardiasis (giardia), or hepatitis will pass right through them. To stop viruses, you need a water purifier.

  That’s exactly what the LifeSaver Wayfarer ($110) is. This backpacker-friendly pump purifier removes 99.9999% of bacteria, 99.99% of cysts and parasites, and 99.999% of viruses from freshwater sources. It is rated to one of the highest levels of certified water protection. Plus, it uses LifeSaver’s proprietary “FailSafe Technology,” so water cannot pass through once the hollow-fiber filter membranes are blocked with contaminants.

  The Wayfarer is simple to use. Plug the output hose into the top and the intake hose into the bottom and place that in your water source. Then start pumping. Within a handful of pumps, clear, virus-free water will start gushing out of the output hose and into your water receptacle.

  LifeSaver sells replacement filters for the WayFarer. Once it becomes harder to pump and your flow rate diminishes, it’s probably time for a replacement cartridge. On the LifeSaver website, they cost just $45. Each one should be good for purifying up to 1,300 gallons of water.

  At 11.4 ounces, the LifeSaver Wayfarer is a light means of water purification and one of the most effective. And at just $110, it’s competitively priced, too. We found it an extremely welcome companion for car camping, backpacking, and traveling in foreign countries.

  Read Review: 11 Ounces, 1,300 Gallons: Lifesaver Wayfarer Packable Water Filter Review

  $100 at REI$100 at Amazon Best Water Filter Bottles Water filters aren’t just great for backpacking and hiking, but can keep you feeling healthy and fresh while road-tripping or traveling abroad. A few of the options below are great for both!

  Below are some of our top choices for travel water filters, whether your adventures take you overlanding, RVing, on day trips, or on international adventures.

  Best Water Filter Bottle GRAYL GEOPRESS Bottle Specs Weight 15.9 oz. Filter type Bottle filter/purifier Filter life 65 gallons Flow Rate 5 L/min

  

The Best Backpacking Water Filters of 20248

  Pros Convenient and great for travel Durable Doesn’t just filter water, but purifies it as well Cons More expensive option Chris Carter The GRAYL GEOPRESS uses electroabsorption and activated carbon to purify water. Simply fill, press down, and drink. It is that fast. (And yes, the convenience, fast filter time, and quality of this filter make it worth the $100.)

  This is truly the best if you’re drinking from really sketchy, off-grid water sources or want a filter for backpacking that isn’t a bladder and hose system. The GRAYL protects against heavy metals, chemicals, and viruses in addition to common protozoa and bacteria.

  We’ve tested this filter abroad and love it for international travel. It’s ideal for when you want to filter all tap water before drinking, and it works wonderfully as a constant companion to keep you hydrated on the go.

  We’ve also used it backpacking and thru-hiking on the Appalachian Trail. For one or two people, this bottle is an awesome purification method.

  We love its fast flow rate of 5 L per minute (under 30 seconds to get clean water). The top complaint is its size (though it’s not any bulkier than a Nalgene). Also, the replacement cartridges are expensive and need to be replaced every 250 L.

  Read our full GearJunkie review for more info on these unique purifiers.

  $100 at REI$100 at Amazon Best of the Rest LifeStraw Go Series 22 oz. Specs Weight 9 oz. Filter type Bottle/straw filter Filter life 4,000 L Flow Rate N/A

  

The Best Backpacking Water Filters of 20249

  Pros 2-stage filter improves taste Affordable Durable build Sleek design with lots of fun colors Cons Straw doesnt extend all the way to the bottom of bottle Straw cover cap unscrews relatively easily Chris Carter Sleek, lightweight, and thoughtfully designed, the newly minted LifeStraw Go Series filter bottle is ready for a rowdy road trip across Mexico, or a casual day on the river. Its streamlined, stylish design joins forces with a 0.2-micron filter and 4,000 L lifespan to deliver a hard-working portable filter thats equally at home on trail, or around town.

  Muted and flashy colorways abound for whatever your vibe might be, and the quick-release top handle protects the nozzle, allowing it to be carried around with ease. Its crafted with surprisingly quality materials for such an affordable model, and has a premium, top-shelf feel. While we love the ability to swiftly unscrew the top handle and snag a quick slurp, we found it can sometimes pop off when we dont want it to, as its only screwed on by a couple of threads.

  At $45, this is one of your best bets for a budget filter bottle. It uses the same type of hollow-fiber filter as the original LifeStraw but seamlessly incorporates it into a BPA-free plastic bottle, thats now made from 50% recycled plastic. The filter straw takes a bit of a suck initially, but soon flows with ease, and has a phenomenally natural taste to it. We do wish it extended a bit lower into the bottle, as we regularly have to pour out a few milliliters of unfiltered liquid — which is a bit deflating on a backpacking trip.

  The 22-ounce bottle is a solid alternative option to the straw if you won’t be near water sources as frequently. The activated carbon filter reduces chlorine, organic chemical matter, and odors for a better taste than other filters we tried, making it a fine bottle to tote around on daily outings.

  Similar to the original LifeStraw, we love that this bottle is quick and simple to use. It’s even easier than just the straw, as the bottle provides a way to carry and store water when you aren’t near a source. We also dig the approachable price point.

  $45 at REI$45 at Amazon RapidPure Purifier+ Bottle Specs Weight 7.2 oz. Filter type Bottle/straw filter Filter life 75 gallons per cartridge Flow Rate N/A

  

The Best Backpacking Water Filters of 202410

  Pros Filters extremely small particles Nalgene-like durability Cons Bulky base doesn’t fit into cup holders or pack sleeves Replacement cartridges are expensive Chris Carter While RapidPure is a newer brand, this bottle made our list due to its construction and convenience. The RapidPure Purifier+ Bottle is a purifier, meaning it protects against viruses, protozoa, and bacteria, making it suitable for traveling virtually anywhere.

  It uses replaceable cartridges with both activated carbon and electroabsorption technology to filter out particles 100 times smaller than the standard 0.2 microns.

  This bottle protects against everything, has a great flow rate, and we love how easy it is to use. But the extra $17 for each replacement cartridge makes it a pricier choice. And we found the plastic cap and shape — especially the base — a bit bulky.

  CHECK PRICE AT RAPIDPURE Platypus QuickDraw Specs Weight 3.3 oz. Filter type Bottle/inline filter Filter life 1,000 liters Flow Rate 3 L/min

  

The Best Backpacking Water Filters of 202411

  Pros Easy to use Efficient system Budget-friendly Cons Some wish the reservoir was larger Chris Carter A newer filter system on the market is the small and packable Platypus QuickDraw. We tested it for several months last year (and plan to use it a lot more this year) and love its low weight, packable size, and good filter rate.

  The QuickDraw’s hollow fiber filter component and 1-liter plastic reservoir come in at just 3.3 ounces. The dual-thread design is awesome and allows you to screw the filter onto both the reservoir or a threaded plastic bottle (like a Smart bottle).

  We found it super easy to use and backflush, and we experienced a good flow rate. The filter is good for 1,000 liters before it needs a replacement.

  Factoring in the size, weight, and price, this filter nearly made it higher on the list. But the Sawyer Squeeze filters down to 0.1 microns — slightly better than the QuickDraw’s 0.2 microns — for a few bucks less. Overall, the Quickdraw is still one of the best backpacking water filters you can buy.

  To learn more, check out our in-depth review of the Platypus QuickDraw.

  $30 at REI$50 at Amazon Katadyn Hiker Microfilter Specs Weight 11 oz. Filter type Pump Filter Filter life 750 liters Flow Rate 1 L/min

  

The Best Backpacking Water Filters of 202412

  Pros Reliable Doesn’t require replacement filters as often as other choices Cons You’ll have to pump it, although the flow rate is good enough to make up for the lost time. Chris Carter The Katadyn Hiker has been one of our long-time favorites for its great price and performance in the long run. Several users found it can last for 2 to 6 years before having to replace the filter.

  The Katadyn Hiker filters down to 0.2 microns for bacteria, protozoa, microplastics, and chemicals.

  Hundreds of users have commented on how well this filter works and how long it lasts. We’ve also found it to work great in subpar conditions (think freezing temps and murky water).

  A few reviewers did note, however, that the bulkiness is a downside, and some prefer the quality of the newer model, the Katadyn Hiker Pro ($100). Regardless of which model you choose, the Hiker filter performs great, and the price is right.

  $90 at REI$90 at Amazon LifeStraw Peak Series — Straw Filter Squeeze Filter Specs Weight Straw: 2.3 oz.; Squeeze Filter: 3.2 oz. Filter type Straw: straw; Squeeze Filter: bottle/gravity filter Filter life Straw: 4,000 L ; Squeeze Filter: 2,000 L Flow Rate Straw: N/A ; Squeeze Filter: 3 L/min

  

The Best Backpacking Water Filters of 202413

  Pros Lightweight design Durable and sleek looking Cons On the heavy side Squeeze filter has a shorter filter life than some Chris Carter We put the new LifeStraw Peak Series — a personal straw filter, squeeze filter, and gravity filter — to the test this spring. The Peak Series Personal Straw Filter and Squeeze Filter turned out to work great for filtering water at various sources in the backcountry.

  The personal Peak Series filter worked extremely well and had a good flow rate. After 20+ years of LifeStraw being on market, it was nice to finally see a big upgrade in materials and design.

  The new design is comfortable, easy to use, durable, and easy to clean and backflush. If you’ve used a LifeStraw filter before and are maybe looking to replace it, we definitely recommend the Peak Series version.

  The LifeStraw Squeeze Filter also performed well in testing, though not as much as others on our list. It’s modular, so while it has the filter incorporated inside the squeeze pouch, you can also move it to the outside (and swap out the cap) if filling bottles or not drinking directly from the filter. Both are a great price.

  Check out our full GearJunkie review of the Peak Gravity 3L and Peak Squeeze filters.

  $25 at REI$44 at REI Platypus GravityWorks 4L Specs Weight 11.5 oz. Filter type  Gravity Filter Filter life  1,500 L Flow Rate 1.75 L/min

  

The Best Backpacking Water Filters of 202414

  Pros Bags are clearly labeled dirty and clean, so theres no confusion Overall performance is great Cons The filter wont work in freezing conditions It tends to clog with silty water Some reviewers wished the seals on the reservoir bags were better Chris Carter This gravity water filter has won a spot on our list for the second year in a row. Why? The Platypus is good for when you need water for more than just drinking (straw filters are great, but not for filtering several liters of water at a time).

  The Platypus GravityWorks system is easy to use and makes filtering significant amounts of water at base camp a cinch. It’s also a great filter choice for car camping along rivers or lakes.

  Although this gravity filter is a different style, we found the disconnecting shutoff valves and flow system easy to learn — and reliable as well.

  The system also can clog, so this filter requires pretty good cleaning and maintenance.

  $135 at REI$101 at Amazon MSR Guardian Gravity Purifier Specs Weight 1lb., 3 oz. Filter type Gravity Filter Filter life 3,000+ L Flow Rate 1 L/2 min

  

The Best Backpacking Water Filters of 202415

  Pros Works great for group travel in the backcountry Requires no backflushing Purifies the dirtiest of water Cons Pricey Heavy Chris Carter With an easy-to-fill 10L reservoir and a 1 L per 2 minutes flow rate (which MSR claims is 2.5 times faster than the competition), the new Guardian Gravity Purifier takes technology designed for the military and brings it to groups of backcountry explorers.

  The purifier meets NSF P248 testing standards, removing bacteria, protozoa, pathogens, and viruses through the 0.02-micron hollow fiber media. With an activated carbon component, it also pulls out chemicals, tastes, and odors.

  MSR’s setup is simple, even if you do need ample space to get the dirty reservoir at least 6 feet above the clean water receptacle (fairly common for gravity water filters). The speedy flow rate is ideal, and the bottle adapter fits a range of sizes to allow the filling of separate water bottles or a larger container with the entire 10 liters.

  This new purifier is up there as one of the best backpacking water filters for larger groups. With no backflushing required and a mesh carrying case, teardown is quick and easy.

  If you’re going where there are no trees for hanging, this could be tricky. Also, at over a pound, it really only works for larger groups where you can split up the load.

  Read our full review of the MSR Guardian Gravity Purifier.

  $300 at REI$300 at Amazon MSR MiniWorks EX Water Filter Specs Weight 16 oz. Filter type Pump Filter Filter life 2,000 L Flow Rate 1 L/min

  

The Best Backpacking Water Filters of 202416

  Pros Easy to clean Unique carbon/ceramic filter design Cons Pretty expensive Heavy Chris Carter MSR makes a few pump filters, but this one is our favorite. The MSR MiniWorks EX protects against bacteria, protozoa, heavy chemicals, and particulates. One of our favorite features of this filter is the fact that it’s compatible with both dromedary bags and Nalgene bottles, so you can easily attach and pump into your drinking vessel.

  The filter is ceramic, meaning you clean it over time instead of replacing it (although you may need to replace the tubing). Some users also noted an issue with pressure building up in the filter chamber, causing the flow rate to slow. If you don’t mind pumping, this is still a good filter option.

  The MSR MiniWorks is the heaviest filter out of the ones we considered, though, and you’ll have to clean it often.

  $120 at REI$120 at Amazon LifeStraw Flex Gravity Filter Specs Weight 6.9 oz. Filter type Gravity Filter Filter life 2,000 L Flow Rate 0.5 L/min

  

The Best Backpacking Water Filters of 202417

  Pros Affordable Lighter than some other gravity filters Cons Pretty slow flow rate Carbon filter needs to be replaced quite frequently Chris Carter This gravity filter won a spot on this list for its price and lighter weight — just 6.9 ounces. The LifeStraw Flex Gravity filters down to 0.2 microns and protects against bacteria, protozoa, and microplastics (not viruses).

  It’s also versatile. You can use it as a personal straw, as a gravity filter for groups, or screw it into a standard plastic bottle or bladder. It’s great for solo or group multisport adventures.

  The flow rate is slower than advertised, and some users had issues with the seal on the bag. And while the hollow-fiber part of this filter is good for up to 2,000 L, the carbon filter portion only lasts 100 L (so you’ll need to buy replacements).

  Check Price at Walmart MSR Guardian Specs Weight 17.3 oz. Filter type Pump filter/purifier Filter life 10,000 L Flow Rate 2.5 L/min

  

The Best Backpacking Water Filters of 202418

  Pros Self-cleaning Super long filter life Fast flow rate Cons Heavy Expensive Chris Carter The Guardian filters out nearly everything (including viruses), has an excellent flow rate, and even self-backflushes during use. For most people and places, however, it’s downright overkill.

  If you’re setting up for a serious adventure that requires filtering a lot of very sketchy water, you may want to consider forking over the cash.

  The Guardian can filter a hefty 2.3L per minute and physically removes viruses, bacteria, protozoa, and particulates, including hepatitis A, E. coli, giardia, cryptosporidium, and more. Just be ready to lug a large item that weighs in at over a pound.

  The MSR Guardian is probably one of the best backpacking water filters on the market. So why didn’t it top the list? Well, in two words, price and weight. It costs a pretty penny at $390 and weighs considerably more than other filters.

  Check out our full review of the MSR Guardian.

  $390 at REI$387 at Amazon SteriPEN Adventurer Specs Weight 3.6 oz. Filter type UV purifier Filter life 8,000 L Flow Rate 1 L/90 sec

  

The Best Backpacking Water Filters of 202419

  Pros Lightweight Easy to use Long lifetime Cons Have to keep it charged Pricey Chris Carter UV filters are popular for a lot of reasons. They don’t require pumping or filtering, and the wait time to kill bacteria and viruses is fairly short (between 60 and 90 seconds).

  The SteriPEN made this list for its low trail weight, ease of use, and long lifetime. (The SteriPEN lasts for up to 8,000 treatments.) It’s also very small and packable, which makes it great for quick outings where you don’t want to carry extra water.

  The downside is this pen is expensive and runs on batteries, which you’ll need to remember to pack for the trail.

  Check out our full review of the SteriPEN Adventurer.

  CHECK PRICE AT CABELASCHECK PRICE AT AMAZON Backpacking Water Filters Comparison Chart

Water FilterPriceWeightFilter TypeFilter LifeFlow Rate
Sawyer Squeeze $39 2.5 oz. Bottle/inline filter Lifetime warranty 1.7 L/min
LifeStraw Personal $20 1.6 oz. Straw filter 4,000 L N/A
Katadyn BeFree 0.6L $45 2.3 oz. Bottle filter 1,000 L 2 L/min
Katadyn Micropur $16 0.9 oz. Chemical purifier 1 L per tab 1 L/30 min
Katadyn BeFree Gravity 3L $75 6.8 oz. Gravity filter 1,000 L 2 L/min
Lifesaver Wayfarer $110 11.2 oz. Pump 5,000 L 1.39 L/min
GRAYL GEOPRESS Bottle $100 15.9 oz. Bottle filter/purifier 65 gallons 5 L/min
LifeStraw Go Series Bottle $45 9 oz. Bottle/straw filter 4,000 L N/A
RapidPure Purifier+ Bottle $55 7.2 oz. Bottle/straw filter 75 gallons per cartridge N/A
Platypus QuickDraw $50 3.3 oz. Bottle/inline filter 1,000 L 3 L/min
Katadyn Hiker Microfilter $80 11 oz. Pump filter 750 L 1 L/min
LifeStrawStraw FilterSqueeze Filter $25 $44 Straw: 2.3 oz.; Squeeze Filter: 3.2 oz Straw: straw; Squeeze Filter: bottle/gravity filter Straw: 4,000 L; Squeeze Filter: 2,000 L Straw: N/A; Squeeze Filter: 3 L/min
Platypus GravityWorks 4L $135 11.5 oz. Gravity filter 1,5000 L 1.75 L/min
MSR Guardian Gravity Purifier $300 1lb., 3 oz. Gravity filter 3,000+ L 1 L/2 min
MSR MiniWorks EX Water Filter $120 16 oz. Pump filter 2,000 L 1 L/min
LifeStraw Flex Gravity Filter $55 6.9 oz. Gravity filter 2,000 L 0.5 L/min
MSR Guardian $390 17.3 oz. Pump filter/purifier 10,000 L 2.5 L/min
SteriPEN $120 3.6 oz. UV purifier 8,000 L 1 L/90 sec

  

The Best Backpacking Water Filters of 202420

  From weekend outings to full-blown thru-hikes, the GearJunkie team has put each of the filters on this list through rigorous testing; (photo/Chris Carter) How We Tested Backpacking Water Filters The GearJunkie team is made up of adventurers from a plethora of different outdoor sports and activities, but each of their hobbies requires a central discipline: proper water filtration in the backcountry. It’s key to survival, and if done poorly, can quickly put you in a dangerous situation.

  Managing editor Mary Murphy curated our initial selection of 14 filters back in May 2020. A prolific backpacker, Mary knows the value of a reliable filter for constant, dependable hydration in the backcountry. Author and Senior Editor Chris Carter took over this guide in August 2022 and has been digging through his gear closet and scouring the internet ever since to bring you the most current, deserving selection possible.

  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. Significant time backpacking and hitchhiking around East Africa forced him to purify water of the grimiest sorts and made him religiously fastidious in his hydration practices. Hes suffered from his fair share of water-born pathogens, and will only rely on the best of the best to filter his fluids on any adventure.

  GearJunkies Camp, Hike, and Backpack Editor, Will Brendza, also contributed to this guide. Will has been professionally testing and reviewing outdoor gear for over 15 years and spends an inordinate amount of time out on the trail. Hes constantly testing and reviewing the latest and greatest outdoor products, including water filters and purifiers, to find the best gear to make his outdoor adventures more enjoyable.

  For this guide, we carefully scrutinized the most reliable, functional water filters that outdoor enthusiasts from all ends of the spectrum depend on in the wild. We brought each of these filters on adventures and made sure that we would feel comfortable with all of them as our primary means of accruing filtered water in the field.

  Buyer’s Guide: How to Choose a Water Filter

  

The Best Backpacking Water Filters of 202421

  Gravity filters are great for having a bunch of filtered water on hand around camp, but can often be too heavy for lightweight solo backpacking trips; (photo/GearJunkie) Inline filters are often used in gravity systems, but they can also be paired with a hydration pouch or water bottle for quick use. Filters such as the ubiquitous Sawyer Squeezeor the Platypus QuickDraw can be used in this way. These generally rely on the user sucking the water from a pouch or water bottle, through the filter, directly into their mouth. With the correct adapters, several models of inline filters can be used with a hydration pack you may already be carrying, offering easy filtration without adding much weight.

  Straw Filters While we dont recommend them as your primary method of water filtration in the wild, straw filters are undeniably one of the easiest ways of procuring fresh water fast. Our favorite budget filter, the LifeStraw Personal, fits this bill. These are great for trail running, mountain biking, or as a backup to your primary filter. These filters allow you to get down and dirty by a stream or lake and drink directly from the source by sipping the water through the filter like a straw.

  The main downside to straw filters is that they dont offer any way to carry filtered water with you, unless you can fit the straw into a water bottle of dirty water you are carrying with you, which can be really annoying. It can also get frustrating having to practically lie down on muddy or rocky banks to get a drink any time you get thirsty. These filters suffice for day hikes, but youll probably want something different for any extended backpacking trip.

  

The Best Backpacking Water Filters of 202422

  Xiaoling filtering water with the LifeStraw Peak Series Collapsible Squeeze 1L Filter on her thru-hike of the Appalachian Trail; (photo/Chandler Keller) Pump Filters Pump filters, such as the MSR MiniWorks, work great for pulling water out of shallow pools or creeks and can be a solid choice for small backpacking groups. They tend to run on the heavy side, take a little more effort to use, and can be quite complicated to clean. For these reasons, you dont see as many pump filters in the backcountry as you used to, but they do still have their place.

  In some cases, as with the MSR Guardian and the Lifesaver Wayfarer, pump filters do a better job at purifying truly nasty water, by removing viruses, bacteria, and protozoa, such as E. coli, giardia, and cryptosporidium. Something to consider a little more seriously while adventuring internationally.

  Water Filter Bottles

  

The Best Backpacking Water Filters of 202423

  Its important to look for a lightweight, packable filter that still boasts a high flow rate for backpacking missions. Many hikers have landed on the Sawyer Squeeze or Katadyn BeFree 0.6L for ultralight backpacking; (photo/Emily Malone) Durability and Longevity The lifespan of a filter greatly depends on its filter method (cartridge, hollow membrane, chemical, or UV light). Backpacking water filters can last anywhere from 250 to 4,000 L. Cleaning your filter regularly using the methods that the manufacturer recommends will also help prolong the life of your filter.

  Filters that use a cartridge tend to last anywhere from 200 to 500 L before you need to replace the cartridge. On the other hand, with other filters that last longer, you may need to replace the entire unit at the end of its life. TheLifeStrawis an example of this; it can filter around 4,000 L, and then it will stop working and need to be replaced.

  For UV methods like theSteriPEN, it’ll last forever as long as you charge or continue to replace the batteries (barring any damage, of course).

  

The Best Backpacking Water Filters of 202424

  Properly cleaning and taking care of your filter can greatly improve its lifespan; (photo/Chris Carter) FAQ What is the best way to purify water when backpacking? The best way to clean your water when backpacking is to use and find the cleanest water source possible. You’ll want to look for clear, running water — somewhere between a babbling brook and a rushing river.

  Avoid stagnant ponds or areas where there might be runoff (from livestock, urban areas, etc.) or debris. You’ll also want to find a safe place to refill, pump, or hang your gravity filter.

  With some filtering methods, like chemical filters and tablets, you’ll want to wait longer to ensure that the water is clean if it’s below a certain temperature (or cloudy).

  

The Best Backpacking Water Filters of 202425

  Purifiers, like the GRAYL GEOPRESS, protect against protozoa or parasites, and bacteria, but you still want to source your water from a fast-flowing stream or river; (photo/Chris Carter) Whats the difference between filtration and purification? Filters most commonly use a tube, pump, or gravity method of filtering. Purifiers use a combination of a tube or chamber with activated carbon or another chemical component to fight against one key difference: viruses.

  All of the choices on this list protect againstat leastbacteria and protozoa, and many also protect against things like toxins, chemicals, and viruses. We recommend choosing the one that will work best based on your situation, budget, and preference.

  How long does a backpacking water filter last? The lifespan of a filter largely depends on the type of filter. Most hollow fiber or activated charcoal cartridges will need to be replaced every couple hundred uses, or after a certain number of liters have been filtered. Some filters, like theLifeStraw, can last for years, but when it’s run its course you’ll need to buy a new one.

  There are also some filters and purifiers that just need new batteries or to be charged.

  

The Best Backpacking Water Filters of 202426

  A filter can last you many years if you take proper care of it; (photo/Emily Malone) Can viruses be filtered out of water? Yes! Purifiers like the Grayl Geopress Purifier and the Lifesaver Wayfarer are built especially to filter and protect against everything you could encounter, whether in the backcountry or in a developing country.

  As long as you are following the instructions on your filter or purifier, it will protect against whatever it’s rated for (usually something like 99.999999% of bacteria and 99.999% of parasites and microorganisms).

  How much should I spend? Our top two considerations when buying gear like this are always: (1) how often we will be using it, and (2) price. Another important factor for many is how long a filter will last. If you backpack or hike 9-12 months out of the year, you probably want to drop more money on a filter that has a longer lifespan.

  When all else fails, you can boil water to be safe. But let’s be honest, having a water filter on hand is much better.

  

The Best Backpacking Water Filters of 202427

  A reliable water filter can be pricey but is an important investment to ensure a safe trip in the backcountry; (photo/Chris Carter)

  

The Best Backpacking Water Filters of 202428

  The Best Insulated Water Bottles of 2024 We tested the best insulated water bottles for 2024 with options for every budget. Top picks include YETI, Hydro Flask, and more!

  

The Best Backpacking Water Filters of 202429

  The Best Backpacking Stoves of 2024 The right stove makes life on the trail better. From ultralight canisters to four-season and multifuel options, weve found and tested the best backpacking stoves.

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