The Versalite is the warmest in Western Mountaineering's ExtremeLite™series! A solid 3-seasons of bike touring or kayaking is at your fingertips with this bag. The VersaLite sports 20 oz. of high lofting 850+ goose down for 6" of loft and a temperature rating of 10°. A “Super” Full Collar will seal in the warmth and protect you from the cold. Total weight is only 2 lbs.