Do you need a memory foam chair seat cushion for back pain? The coccyx seat cushion is the most comfortable seat cushion on the market today. With an enhanced memory foam formula, this wedge/U-Shaped cut-out ergonomic design cushion will contour to your body’s pressure points to promote blood flow and help ease the pain. This coccyx seat cushion has proven to restore your spine’s natural lumbar curve to the correct posture, reducing stress on your lower back, hips, and tailbone. You will feel instant relief from lower back pain when sitting for long periods of time. Easily remove the cover for cleaning.