The Western Mountaineering Terralite, perfect for side sleepers Mummy style bags offer efficient warmth and great packability but are sometimes lacking in comfort. For those who sleep on their sides this can be especially true as mummy bags are typically cut so snug that there is not enough room to roll about. The WM Terralite offers a perfect compromise: low weight, mummy bag warmth, and a generous 656842 shoulderhipfoot cut that allows users room to spread out or move easily. Warmth is provided by 18 ounces of Western's super high quality 850 fill down. A 3 dimensional draft tube along the zipper prevents cold spots as well as zipper snags. Speaking of zippers, Western Mountaineering put two on the Terralite to allow an opening at the feet or to zip mummy bags together for sharing warmth with a friend. On balmy nights the bag can be unzipped entirely to be used as a comforter. Another way to cool down the Terralite on nights warmer than 25 degrees is by shifting the down insulation along the continuous baffles so that it lies underneath the sleeping bag where it provides less warmth. Despite the comfortable shape the Terralite weighs in at under 2 pounds. Much of the weight saving can be attributed to the ultralite 12 denier ripstop nylon shell fabric that is shockingly durable for the weight. Features and Benefits a Ultralight 12 denier ripstop nylon shell fabric. a 5 14 SpacingContinuous baffles keeps insulation where it belongs. a 656842 shoulderhipfoot girth. a 25Adeg F rating a 18 oz. Down Fill. a Just 29 ounces total weight.