Features of the NEMO Steelhead 20 Sleeping Bag Designed specifically with anglers and hunters in mind steelhead offers a combination of Insulation and fabrics tailored for use in the wet cold and rainy weather in the backcountry Performance Features including NEMO's Thermo Gills which unzip to let warm air out and let you regulate your temperature and a waterproof/breathable foot box that protects your bag from any tent wall condensation Stretch stitching at the knees provides extra comfort for side sleeping and extra mobility when in your bag