This large medicalgrade donut cushion is crafted from premium memory foam, offering orthopedic support and effective pressure relief for the coccyx, tailbone and pelvic area. The hollow ring design eases pain from hemorrhoids, injuries, postsurgery recovery and longhour sitting. With a soft washable cover and nonslip bottom, it is perfect for office chairs, car seats and home daily use. | Nordara Large Memory Foam Donut Cushion Orthopedic Ring Seat in Black