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 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 REGULAR EN Limit Temp Rating: 17F / -9C EN Comfort Temp Rating: 28F / -2C Fill Weight: 14.7 oz / 418 g Minimum Weight: 1 lb 15 oz / .88 kg Fits Up To: 6' 0" / 183 cm Length: 78" / 198 cm Shoulder Circumference: 62" / 157 cm Hip Circumference: 56" / 142 cm Footbox Circumference: 40" / 102 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 LONG EN Limit Temp Rating: 17F / -9C EN Comfort Temp Rating: 28F / -2C Fill Weight: 16.3 oz / 463 g Minimum Weight: 2 lbs 2 oz / .96 kg Fits Up To: 6' 6" / 198 cm Length: 84" / 213 cm Shoulder Circumference: 64" / 163 cm Hip Circumference: 58" / 147 cm Footbox Circumference: 42" / 107 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