One of our most popular and versatile models, the AlpinLite is a go-to choice for all-around three-season camping-from crisp nights in the Sierra Nevada to high-altitude treks in Colorado. This wider-cut, fully baffled sleeping bag is packed with 850+ fill power goose down, offering premium warmth without excess weight. The full-length #5 YKK zipper provides adjustable ventilation, while the insulated draft tube helps seal in heat when temperatures drop. Built with breathable 12-denier ripstop nylon, the AlpinLite delivers lightweight durability for backpackers who need a reliable, comfortable, and ultralight performance bag for a wide range of conditions.Filled with 850+ Fill Power ethically-sourced premium goose down Continuous baffles allow you to shift down for more insulation in colder weather Full-length #5 YKK zipper provides a smooth, easy unzipping experience while saving weight Insulated Draft Tube blocks cold air and keeps the torso better insulated Breathable 12 denier ripstop nylon outer shell makes bag ultralight yet durable Fully insulated draft collar seals in inner heat without adding much weight Comes with ultralight stuff sack and breathable mesh storage bag 1 lb. 15 oz. Total Weight