Warmth without the weight. Just the right amount of down to keep you warm. Key Features of the Mountain Hardwear Nitrous Jacket: Hi-Fiveª 30D Rip(100% nylon)800-Fill Goose DownQuilted construction holds insulation in placeTwo front handwarmer pocketsDual hem drawcords seal in warmthJacket stows in pocketFull elastic cuffs slide easily over layers to seal in warmthMicro-Chamoisª-lined chin guard prevents zipper chafe