Airstomi Comfort Portable Memory Foam Seat Cushion Pillow Back Material:Deluxe Memory Foam. Healthy posture and proper spine alignment. Just the right size and stays in place.(Size: 38x46x7cm) Zippered, machine-washable velour cover for easy cleaning. Reduces pressure on the coccyx, tailbone and hip bones while sitting Superior comfort for a chair, car seat, plane or wheelchair