Seventy percent of people sleep on their side, yet mummy bags are not designed to accommodate this. Updated with new contours, Disco(TM) continues to reign as the ideal down backpacking bag for side-sleepers, offering the plushest comfort possible on the trail.The classic Spoon(TM) shape provides a generous cut at the elbows and knees so side sleepers can shift positions comfortably throughout the night, while still packing remarkably small. Premium 650FP hydrophobic, PFC-free, RDS Certified down ensures traceability throughout the supply chain.These 3-season backpacking bags are loaded with features, including Thermo Gills(TM) that help regulate temperature during the night, Blanket Fold(TM) that provides tucked-in comfort, and a waterproof/breathable footbox to withstand tent condensation. Left-sided zippers on Men's and right-sided zippers on Women's allow Disco(TM) to zip together for a double version of these favorite sleeping bags.Classic Spoon(TM) shape adds room at elbows and knees for versatile comfort. Premium 650FP hydrophobic, PFC-free, 100% RDS Certified down is traceable and ensures humane treatment throughout the supply chain. Waterproof/breathable footbox protects from tent condensation, keeping feet warm and dry. Blanket Fold(TM) external draft collar and a full-length draft tube provide tucked-in comfort and temperature regulation. Thermo Gills(TM) allow you to vent body heat without letting cold drafts in. Full-length double-slider #5 YKK zipper with zipper plow makes getting in and out of the bag a breeze. Integrated pillow pocket allows a jacket, extra clothes, or Fillo(TM) to be stuffed into the sleeve opening for secure, elevated support through the night. Opposite-sided zippers on Disco(TM) Men's and Women's models increase versatility by allowing them to be zipped together into a double sleeping bag.specs: (REGULAR, LONG)& sizing Carry Weight2 lb , 3 oz / 998 g.Packed SizeReg:L 12.5 x 6.5 in dia / 31.75 cm x 16.5 cm diaLong: 12.5 x 7.0 in dia / 31.75 cm x 17.78 cm diaTemp Rating30F / -1 CISO Lower Limit31F / -1 CFill TypeDuck DownFill Weight11 oz. / 312 gFits Up ToReg: 6' / 183 cm; Long: 6' 6"Shoulder GirthReg: 64 in / 163 cm; Long: 66"/ 167.6 cmHip GirthReg: 59 in / 150 cm; Long: 60 in / 153 cmKnee GirthReg: 62 in / 157 cm; Long: 64 in / 163 cmCompressed VolumeReg: 7.2; Long: 7.8 construction& materials (REGULAR, LONG)Shell Fabric30D Nylon Ripstop w/ DWRFootbox Fabric40D Nylon Ripstop OSMO(TM) w/ DWRLining Fabric30D Nylon Taffeta w/ DWRColorTorch / Stormy NightZipper LocationLeftStuff SackCompression stuff sack, Mesh storage bagInsulation650 FP Duck Downconstruction& materials (LONG)Shell Fabric30D Nylon Ripstop w/ DWRFootbox Fabric40D Nylon Ripstop OSMO(TM) w/ DWRLining Fabric30D Nylon Taffeta w/ DWRColorTorch / Stormy NightZipper LocationLeftStuff SackCompression stuff sack, Mesh storage bagInsulation650 FP Down