Seventy percent of people sleep on their side, but mummy bags are not designed to accommodate this. With a unique Spoon(TM) shape adding room at the elbows and knees, the Disco(TM) is a three-season down men's backpacking bag that is designed for side sleepers, and allows you to shift positions throughout the night.FeaturesSpoon(TM) shape adds room at elbows and knees. Insulated with premium fluorocarbon-free, water-resistant Nikwax Hydrophobic Down(TM). 100% Responsible Down Standard (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 provides tucked-in comfort and temperature regulation. Thermo Gills(TM) allow you to vent body heat without letting cold drafts in. Integrated pillow pocket allows a jacket, extra clothes, or a Fillo(TM) to be stuffed into the sleeve opening for a handy pillow-on-the-go.Video -NEMO Disco Men's 30 Degree Down Mummy Sleeping Bag