Kelty Celestial 55 Degree Sleeping Bag Regular Fill: Polyester Fiber; Shell: 100% Polyester; Liner: 65% Polyester/ 35% Cotton Imported Temp Rating : 55 / 13C Insulation : CloudLoft Synthetic Weight 2 lb. 2 oz. Quilt-shell, loose-liner construction Can be fully unzipped and opened flat for use as a blanket