Kelty Coromell 25 Degree Down Sleeping Bag Fill: Down; Shell: 100% Nylon; Liner: 100% Polyester Imported Temp Rating : 25 / -4C Insulation : 550 Fill-Power Down Weight 3lb 4oz Semi-Rectangular shape with Ground-level side seams to prevent heat from escaping Can be fully unzipped and opened flat for use as a blanket