The Cockpit Cover is constructed with a durable yet lightweight waterproof nylon. All the seams are sealed and the bungee rand is encased in a soft Grip-Tex fabric which makes a great watertight seal on a variety of recreational boats. ?Griptex bungee sleeve. Adjustable bungee rand. Color-coded nylon pull loop. Cross deck bungee adjustment strap. 100% coated nylon. XL: Length 31-37", Width 18-22"|3XL: Length 33-39", Width 19-23"|5XL: Length 39-45", Width 21-25"