. Features. Double Layer Stitching. Outer Material: 210T Rip-Stop Polyester. Stuff Sack Material: 190T Polyester. Materials. Inside Lining: 100% Cotton Flannel. Specifications. Fill Weight: 3lb. Hollow Fiber. Stuff Sack Size: 16"x8.5". Width: 36in. Height: 80in. Weight: 4.60lbs.