Get more comfortable with temperature- and pressure-sensitive memory foam that gently molds to your shape. Leather-like bottom cover reduces movement on chair. Memory foam was originally developed by NASA to relieve astronauts of G-force during lift-off. Seat rest includes removable and washable cotton/polyester cover. General Category: Seating Accessory; Sub-Category: Seat Cushion; Color(s): Black; Color Family: Black.