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 35 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 risptop Liner Fabric: 15d nylon risptop Tech Specs REGULAR EN Limit Temp Rating: 27F / -3C EN Comfort Temp Rating: 37F / 3C Fill Weight: 9 oz / 255 g Minimum Weight: 1 lb 6 oz / 0.61 kg Fits Up To: 6' 0" / 183 cm Length: 78in / 198 cm Shoulder Circumference: 62" / 157 cm Hip Circumference: 56" / 142 cm Footbox Circumference: 40" / 102 cm Mesh Stoarge Bag Size (LxW): 20 x 12" / 51 x 31 cm Stuff Sack Size (L x W): 13 x 7" / 33 x 18cm LONG EN Limit Temp Rating: 27F / -3C EN Comfort Temp Rating: 37F / 3C Fill Weight: 10.1 oz / 286 g Minimum Weight: 1 lb 8 oz / 0.67 kg Fits Up To: 6' 6" / 198 cm Length: 84in / 213 cm Shoulder Circumference: 64" / 163 cm Hip Circumference: 58" / 147 cm Footbox Circumference: 42" / 107 cm Mesh Stoarge Bag Size (LxW): 20 x 12" / 51 x 31 cm Stuff Sack Size (L x W): 13 x 7" / 33 x 18cm