When the size of a sleeping bag means the difference between adding and subtracting essentials from your pack, the lightweight, highly compressible Marmot NanoWave 45F ensures you dont have to subtract what you need. SpiraFil high-loft insulation with blanket construction retains warmth. Details include two-way zipper sliders with zipper garage, snagless draft tube and two hang loops. Constructed of 50-denier polyester fabric. Includes compression stuff sack. Imported. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Mummy Sleeping Bags.