NRS Neoprene Cockpit Cover 4-mm neoprene is waterproof and extremely durable, able to keep out unfriendly critters as well as windborne and falling debris during storage A rugged shock cord along with a rubberized inner deck coating grips the kayak combing from the inside, resisting slippage and giving you a secure way to keep your gear and the inside of your boat dry while traveling Stretchy nylon outer covering makes it easier to get on and off while looking pretty sleek as well Rubberized inner deck coating