Minicell Closed Cell Foam Waterproof with Skin 24"x 24" x 4.5" Thick Black Minicell Foam 2LB- 24" x 24 x 4.5" Thick Has a layer of soft skin on the top and bottom Material: (L200) Closed Cell Foam, Also known as cross-link polyethylene "Skin-Soft" aesthetically pleasing material that exhibits a smooth surface and extremely line and uniform cell structure and offers excellent flexibility and resilience. Used for: Sport Padding, Gymnasium Wall Protection, Sports Flooring and Mats, Camping Pads, Ship and Dock Fenders, Toys and Games, Exercise Mats, Kayak and Canoe Seats, Kickboards.