Our award-winning, best-selling three-season sleeping bag. Featuring our state-of-the-art ExtremeLite(TM) shell fabric, an efficient mummy shape and 850+ fill power ethically sourced goose down, the UltraLite is the perfect companion for any, or all, of your backcountry adventures. Whether it&';s the John Muir Trail or a weekend getaway, the UltraLite has all the features you need to stay warm on the trail, without sacrificing weight, durability or volume. 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. 13 oz. Total Weight