Seventy percent of people sleep on their side, yet mummy bags are not designed to accommodate this. The Nemo Men's Forte 20-Degree Synthetic Sleeping Bag has been updated with Primaloft's, lightweight, ultra-lofty and supremely resilient Rise insulation featuring 80% post-consumer recycled content. Classic Spoon shape adds room at elbows and knees for versatile comfort Updated with Primaloft Rise insulation Waterproof/breathable footbox protects from tent condensation, keeping feet warm and dry Thermo gills allow you to vent body heat without letting cold drafts in Blanket fold external draft collar provides tuck-in comfort Full-length double-slider YKK zipper Integrated pillow pocket Opposite-sided zippers increase versatility Lifetime warranty against manufacturer defects