Lumbar support helps ease lower back pain. Orthopedic design helps keep spine in proper alignment. Removable, machine washable polyester/cotton cover. Foam meets CAL # 117 requirements. Size: 14" x 13". Highly resilient visco-elastic foam helps reduce pressure point sensitivity. Memory foam reacts to the temperature of the body and forms naturally to body contours. Elastic strap helps hold cushion in place.