When weight and size are a major concern, pack The North Face Pyxis Sleeping Bag. The Pyxis ultra light design and extreme compressibility effectively minimize your load. To reduce weight, The North Face even replaced their standard embroidered logos with a heat-transfer print. 20D Hyperlight ripstop material increases durability, and overlapping shingle construction traps heat in while eliminating escape seams. Retention loops keep you from rolling off your pad in the middle of the night and a storage sack helps your synthetic mummy bag retain loft when its off the trail.