Forward-thinking design in a sleeping bag? Right here. Introducing the men's Marmot Ollan 20° sleeping bag. Made from Pertex Bio-based fabric and recycled HL-ElixR™ ECO insulation, this lightweight, packable synthetic sleeping bag is a choice you can feel good about. A wool/polyester insulation blend holds the warmth on cold nights out, while the roomy shape provides extra comfort. Sleep warm? The full-length, 2-way zipper has your back when you need extra ventilation.