Stay warm in temperatures as low as 20°F For campers up to 5 ft. 11 in Thermolock draft tube along the zipper keeps body heat from escaping Fiberlock construction keeps insulation from shifting Easier packing with fasteners that lock bag in place as you roll Stuff sack included No-snag zipper Zip 2 bags together for double the room Measures 75 x 33 in Machine washable for easy cleaning