Simple Deluxe Solid Orthopedic Foam Seat Cushion with Forever Cool Bamboo Cover Bamboo Ergonomic design for promoting healthy posture, proper spine alignment, and superior comfort. Reduces pressure on the coccyx and tailbone while sitting. Made of high quality memory foam. Zippered,machine-washable cover. Retains its shape even after long periods of use.Ideal for chairs or car seat. Size: Approx. 17x13x3 Color: White