The Nitrous is the perfect bag when every gram counts. It’s designed for use in summer or shoulder seasons, or can be paired with a Quest booster for year–round use. The mummy shape is generous, and filled with 800-850 loft Hydrophobic Down, it’s available in three temperature ratings (+2, -1 and -3°C ISO 23537.1 limit of comfort) and small, regular and large sizes. The lightweight downproof by construction 10 D Vapour Vent V2 fabric offers excellent breathability, durability and water repellence, while the full–length YKK #5 locking zip has an anti-snag slider and opens at both ends, allowing extra ventilation. Tech Specs Intended use: lightweight bushwalking, bike/backpacking Temperature rating: Comfort 3°; Limit -3°; Extreme -20° User height: Small 177cm; Regular 187cm; Large 195cm Shoulder circumference: Small 155cm; Regular 160cm; Large 178cm Stuff sac size: Small 4.5L; Regular 4.5L; Large 4.5L Weight (800-850 fill): Small 540g; Regular 580g; Large 620g Shape: mummy Baffle construction: Vertical-V baffle system (vertical/V-baffles) with, box wall construction Zip: YKK #5 with locking slider and anti-snag cover Zip configuration: full-length zip Zip side: Small all in RH; regular available with RH or LH; large with LH Zip pull: glows in the dark Shell fabric: 10-denier Vapour Vent V2. Downproof by construction, highly breathable, with C0, environmentally-friendly water repellent treatment Internal fabric: 10-denier Vapour Vent V2. Downproof by construction, highly breathable, with C0, environmentally-friendly water repellent treatment Down loft: 800-850 loft, tested by the IDFL Down distribution: 55% top, 45% bottom Down treatment: DWR (hydrophobic durable water repellency) Booster compatible: Quest series boosters Compression stuff sack: Included Storage bag: included Size: Small, Regular, Large; Loft: 800+; Zip Side: Right, Left