Alter your tastes, tap into lightweight, mummy-style comfort. Simple construction and a classic mummy bag shape are the hallmarks of one of our best-selling sleeping bags for backpackers who put a premium on low weight, incredible comfort and straightforward tech. The Women's Nitro 20 sleeping bag is designed with durable nylon ripstop and insulated with 800-fill, hydrophobic DriDown(TM) to keep you toasty warm, even on damp nights. A draft collar seals in the heat when moving around, and sidewall baffles prevent the down from shifting and causing cold spots, but our patented self-sealing foot vent provides relief to hot sleepers without the need to kick off the covers. Top it off with an anti-snag zipper to eliminate sleepy struggles and take greater comfort with this intuitive mummy bag. Key Features PFC-Free 800FP Dridown and 15d nylon fabrics / ultralight weight Patented Self Sealing foot vent / fast and easy ventilation Draft-dodger collar / helps prevent drafts 5" baffle spacing and side wall baffles / helps to keep down from shifting keeping you warmer Anti-snag zipper tracks / makes getting in and out easy Materials Insulation: 800FP PFC-Free Dridown Shell Fabric: 15d nylon ripstop Liner Fabric: 15d nylon ripstop Tech Specs EN Limit Temp Rating: 13F / -10C EN Comfort Temp Rating: 25F / -4C Fill Weight: 19.93 oz / .565 kg Minimum Weight: 2 lb 2.5 oz / .98 kg Fits Up To: 5' 8" / 173 cm Length: 74" / 188 cm Shoulder Circumference: 58" / 147 cm Hip Circumference: 58" / 147 cm Footbox Circumference: 39" / 99 cm Mesh Storage Bag Size (L x W): 20" x 12" / 51 x 31 cm Stuff Sack Size (L x W): 15" x 7.5" / 38 x 19 cm