Braided nylon parachute cord, with a single strand nylon core. Measuring about 2.5mm - 3mm (about 3/32 inch) thick, this cord can be used for all sorts of craft applications. 325 cord is especially suitable for jewelry making. The soft braided outer shell is durable yet cushioned, allowing this cord to be flexible yet comfortable enough to wear against the skin. Mil-spec standard USA production and super quality. 21 feet.