Kelty Callisto 15 Degree Sleeping Bag Regular Fill: Polyester Fiber; Shell: 100% Polyester; Liner: 100% Polyester Imported Temp Rating : 15 / -9C Insulation : CloudLoft Synthetic Weight 4 lb. 11 oz. Can be fully unzipped and opened flat for use as a blanket Differential cut to maximize loft and warmth