The Nemo Men's Riff 30-Degree Down Sleeping Bag is loaded with features, including Thermo Gills that help regulate temperature during the night, Blanket Fold that provides tucked-in comfort, and a waterproof/breathable footbox to withstand tent condensation. Ultralight spoon shape adds room at elbows & knees 100% Responsible Down Standard (Rds) Certified traceable down Waterproof/breathable footbox protects from tent condensation, keeping feet warm & dry Blanket Fold external draft collar provides tuck-in comfort Thermo Gills allow you to vent body heat without letting cold drafts in Full-length double-slider YKK zipper Integrated pillow pocket allows a jacket, extra clothes, or Fillo to be stuffed into sleeve Manufacturer lifetime warranty against defects