Fiberlock™ construction prevents insulation from shifting, extending the life of the sleeping bag. Thermolock™ draft tube prevents heat loss through the zipper. ZipPlow™ zippers protect fingers by allowing a snag-free opening and closing of the sleeping bag. The Roll Control™ system keeps the bag straight when rolling up for an easy pack-down in the included. sack and a Quick Cord™ system means no tying is required! Comfort Cuff™ design surrounds your face in softness. Coletherm® hollow polyester insulation provides better heat retention with less weight. Full-cover construction locks in heat by eliminating cold spots. Designed with a cotton canvas cover for durability. Packing up is made easy with the Wrap ‘N’ Roll™ system, which lets you roll your bag right up into an attached cover. Handy storage pocket. Supplied with comfortable and compact pillow.