Qualitus Memory Foam Seat Cushion - Orthopedic Comfort for Lower Back, Tailbone (Coccyx), & Sciatica Pain - Great for Office Chairs, Stadium Seats, Car Seats, and Wheelchairs. DEEP ERGONOMIC DESIGN FOR PAIN RELIEF - The Qualitus Memory Foam Seat Cushion provides orthopedic support for your lower back, your tailbone (coccyx), & sciatica. PREMIUM HIGH-DENSITY FOAM - Made from high quality memory foam with a deep ergonomic design for maximum comfort. INCREDIBLE VERSATILITY - Enhance your comfort anywhere you sit. Use it at the office, in cars, in planes, in trains, on your wheelchair, at stadiums, etc. MACHINE WASHABLE - Removable cover is conveniently machine washable. LIFETIME WARRANTY - Comes with a limited lifetime warranty so you can shop without worry.