The Nemo Men's Riff 15-Degree Down Sleeping Bag is NEMO's top-of-the-line backcountry-oriented Spoon shaped sleeping bag. This 3-season 800Fp down bag offers a more athletic cut, designed for side sleepers who prefer space-saving packability & shaving critical ounces for long hours on the trail. New ultralight spoon shape adds room at elbows and knees 100% Responsible Down Standard (Rds) Certified traceable down Waterproof/breathable footbox protects from tent condensation, keeping feet warm and 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 Lifetime warranty against manufacturer defects