Long lasting marine grade polyester jacket. Jacket ribbed for better gripping and knotting. 1/4 or 6 MM great for light-weight luggage straps, roof racks, kayaks, trailers, canoe's, small boats, surf boards, ten poles.Tie downs for light weight tarpaulins/groundsheets. Marine and sailing boats, canoes, kayaks and other small boats. Car, boat and trailer covers. The bungee cord is also commonly known as shock cord or stretch cord.