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 Tunnel Hood (limits exposure of your head helping keep in warmth) Neck Baffle Hood Adjuster (Draw cord for face hole adjustment) Draft Tube (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 2 lbs 15.6 oz (1350 g) Fill weight 28.6 oz (810 g) Insulation 650 Fill Power Down Fabric Shell & Lining: 30-denier Super Multi (multi-filament) polyester taffeta DWR Standard DWR treatment Compressed size 7.9 x 15.6 in (20 x 40 cm), 11.1 L Country of origin VIETNAM Other ISO TESTED: 23 / -5 (Comfort), 11 / -12 (Lower Limit)Max User Height: 6 ft 6 in / 198 cmShoulder Girth: 63 - 82 in / 160 - 208 cmKnee Girth: 53 - 69 in / 134 - 174 cm