For temperatures 30⁰ F to 50⁰ F For heights up to 5 ft. 11 in Polyester cover and soft tricot fiber blend liner Thermolock System prevents heat loss through the zipper Two-way no-snag patented zipper plows fabric away from the zipper Unzip the bottom for extra ventilation on warmer nights Roll Control Design makes folding quick and easy Quick Cord System makes fastening a cinch without tying Zip two together for double the room Machine washable for easy cleaning at home