Standard: No thin holes in the square strip; Size: Approx. 15.7 x 15.7 x 2.2 inches (400 x 400 x 55 mm); Material: Surface: Sheepskin, Filling: Urethane cushion; Handling: Washing, dehydrating; Medical sheepskin using wool mark with excellent body pressure dispersion and moisture absorption. Approximately 5,000 high-density bristles disperse body pressure. Approximately 2 times more absorbent than cotton and 40 times more absorbent than polyester. Can be washed.