The MontBell U.L. Super Stretch Hugger 2 25 Degree Down Sleeping Bag provides warmth in sub-freezing temps at an incredibly low 1lb 12oz. Though it weighs less than your 1L bottle of water, this 800-fill down sleeping bag uses stretch stitching to hug your body and eliminate dead air space. Multi-Box baffle construction ensures the Super Stretch Hugger Sleeping Bag has no cold spots, and its bottom eight-inch baffle seals to fit smaller users. This down mummy bags warmth to weight ratio make it ideal for three season backpacking or rock climbing trips.