When space and weight are at a premium—think biking trips, kayak treks, and epic backpacking—you need a super-packable, stuffable sleeping bag that fits into sterns, bike panniers, and bags. The lightweight, PFC-free, mummy-style NanoWave 25° Sleeping Bag keeps you comfortable in temperatures around 25°F. Synthetic SpiraFil High Loft Insulation will keep you warm even when things get wet. A full-length zipper provides easy ventilation, while two-way zippers and a snagless draft tube prevent air from sneaking in and fabric from catching.