Linenspa Orthopedic Gel Foam Seat Cushion - Tailbone/Coccyx Comfort - Support for All-Day Sitting and Back Pain Relief Orthopedic design helps alleviate lower back pain by providing comfort and support while sitting Traditional gel foam helps distribute weight evenly and improve posture for better comfort U-shaped opening helps to relieve tailbone pressure while also reducing numbness Perfect for work, cars, truck drivers, airplanes, wheelchairs, and sporting events Chair pad measures 17 x 14 x 3, rayon from bamboo velour cover is removable and washable