Soft, resilient memory foam cushion is pressure sensitive to help relieve stress points. Smart gel-cooling layer helps provides longer lasting cooling by dissipating heat. Non-slip under-cushion cover keeps the cushion firmly in place on your chair. Long-lasting, fade-resistant fabric cover. Washable. Seat Cushion?Non-slip undercushion cover keeps the cushion firmly in place on your chair. General Category: Seating Accessory; Sub-Category: Backrest; Temperature Control; Color(s): Black; Color Family: Black.