Eureka Centerfire -10 Degree Rectangular Sleeping Bag Shell: 100% Cotton Lining: 100% Cotton Filling: 100% Polyester Imported Strong, durable outershell is made of 8.5 oz Cotton Duck. Lining Material is 100% yarn dyed cotton flannel Downwind foot vent that can be opened for added ventilation on warm nights Removable, integrated carry duffle bag can be stuffed and used as a pillow Carry weight of 13 pounds, 6 ounces