DESC: Backpackers will appreciate Marmot's meticulous craftsmanship and the light weight of this premium 800-fill goose down bag for years to come. High-loft 800-fill-power goose down gives you unsurpassed warmth for remarkably little weight--packs down tight, too! Water-repellent, windproof, downproof nylon microfiber shell is ultra-lightweight, yet strong; Sarcophagus(TM) Shape increases comfort. Baffles are made with stretch tricot, providing strength and long-wearing durability. Ground-level side seams eliminate cold air leaks and allow the goose down insulation to loft fully. Nautilus 6-baffle hood envelopes your head in warmth, while the Face Muff allows hood to be cinched snug without digging into your face. Down-insulated draft collar and large draft tube backing the zipper seal cold out; zipper guards prevent zipper snags. Draft collar features easy-access drawcord; locking, two-way full-length zipper prevents bag from inadvertently opening during the night. Hidden two-way draft tub