Unique air pocket design helps stimulate blood circulation and invigorate back muscles Air pockets allow air to circulate to keep back cool and comfortable Perfect for improving the ergonomic comfort of your office chair or favorite chair at home Universally designed to fit nearly every car seat Help ease the back pain that comes from sitting in car seats or chairs with inadequate lumbar support. This best-selling lumbar back support cushion is recommended by chiropractors to properly support the lower back and reduce slouching. Orthopedic, contoured design hugs your back, helping keep your spine in proper alignment; the hardness of the removable wood board insert offers even more advanced support when you need additional firmness.