Royaloak Berry office chair featured with adjustable seat height, back tension, head rest support, foldable hand rest. The flexible high grade nylon mesh with lumbar support for back and is designed for air circulation when you lean back. Revolving Mechanism-Reclining is effortless. Push/Pull the lever, in/out to lock/unlock reclining at the upright position. Buy Berry office chair only at Royaloak.