FEATURES Super Spiral Stretch System (US. Patent NO. 7,900,301) Multi-tube construction Two way right or left hand mating zippers (67 in / 170 cm) Anti-snagging slider cover Hood Adjuster (Draw cord for face hole adjustment) Insulated Flap (covering the zipper to shut out cold air) Auto Locking Zipper (to limit zipper "slip" during the night) Triangle Gusset (Reinforcement at the end of the zipper) Storage sack included Stuff sack included (Tapered, bias stretch stuff sack for easier packing) SPECS Weight 1 lb 4.2 oz (573 g) Fill weight 9.9 oz (280 g) Insulation 800 Fill Power EX Down Fabric Shell & Lining: 10-denier Ballistic Airlight nylon DWR Standard DWR treatment Compressed size 5.5 x 10.9 in (14 x 28 cm), 3.8 L Country of origin VIETNAM Other ISO TESTED: 40 / 4 (Comfort), 31 / -1 (Lower Limit)Max User Height: 6 ft / 183 cmShoulder Girth: 59 - 76 in / 149 - 194 cmKnee Girth: 48 - 63 in / 123 - 160 cm