Sleep comfortably, even when its 20 degrees F outside, in the Coleman Dunnock Cold Weather Sleeping Bag with cotton cover and cozy cotton flannel liner. The specially-designed, patented zipper system plows through the fabric to avoid snags, even around the bottom corner. The Thermolock System reduces heat loss through the zipper, and Fiberlock Construction prevents insulation from shifting, extending the life of your sleeping bag. When youre ready to pack up, our patented Roll Control System keep the bag in place for easier rolling and the Wrap ‘N Roll integrated packing system makes storage a cinch. The sleeping bag fits heights up to 5 ft. 11 in. and is machine washable.