Previously rated at a conservative 15 degrees and now sporting a full draft collar, the astonishingly light VersaLite Super is now rated as a 10 degree bag. The VersaLite contains 20 ounces of high loft 850 down fill for a full 6 of loft. 62 of shoulder girth is extra roomy, and the total weight is still only 2 pounds. 20 x 20 denier Ripstop nylon is calendared to provide a more downproof fabricmeaning down is less likely to leak out of your bag like a goose shedding its feathers, increasing the life of the bag. A silky smooth taffeta lining is soft on the skin and breathable for climate control inside your bag so you stay warm without cooking your goose. Youll appreciate Western Mountaineerings meticulous craftsmanship when youre still sleeping toasty warm decades after you purchased this bag.