An oversized chair for maximum comfort, the SPACE Seating Double AirGrid Back and Black Mesh Seat Ergonomic Chair is guaranteed to provide a more relaxing experience behind your desk. With a 400-lb weight capacity and numerous controls to adjust everything from pivot to height to armrest position, this is one chair that can adapt to your every preference. The back even features AirGrid technology to keep your own back as cool as can be. Built-in lumbar support assures you that you stay in alignment while giving you the option to adjust it how you see fit. Comes with an aluminum base with oversized dual-wheel carpet casters.