Temperature and pressure sensitive memory foam dissipates pressure while gently molding to your body shape. Features leather-like bottom cover to reduce movement on chair. Originally developed by NASA to relieve astronauts of G-force experienced during lift off. Removable, washable, cotton/polyester fabric cover. Give your body full support with high-density, viscoelastic memory foam. Temperature and pressure-sensitive foam molds to body shape. Memory foam dissipates pressure to provide maximum comfort. Seat rest features leather-like bottom to reduce movement on chair. Originally developed by NASA to relieve astronauts of G-force during lift-off. Removable, washable black fabric cover included. 16"L x 15.5"W x 2"H.