Seat cushion with gel inside. Provides relief from lower back pain and sciatica, great for use in the office, driving and traveling, promotes recovery from lower back problems, herniated discs, coccyx injuries, sciatica and other back problems. This accessory is made of high-quality memory foam and thick liquid gel for added comfort. The memory foam uses body heat to mold and contour to your exact shape and form. The memory foam chair cushion takes your body weight into account and provides support where you need it most.