The Nemo Men's Forte 35-Degree Synthetic Sleeping Bag has Primaloft's, lightweight, ultra-lofty & supremely resilient Rise insulation. Forte's classic Spoon shape provides a generous cut at the elbows & knees so side sleepers can shift positions comfortably throughout the night. Classic Spoon shape adds room at elbows and knees for versatile comfort Maximum warmth retention and water resistance Deluxe fabrics offer an ultra-plush sleep experience Thermo Gills allow you to vent body heat without letting cold drafts in Blanket Fold external draft collar provide tucked-in comfort and temperature regulation Full-length double-slider 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 to be stuffed into the sleeve Opposite-sided zippers on increase versatility Manufacturer lifetime warranty against defects