The design of our Office Star Air Grid Seat & Back Task Chair with Adjustable Angled Arms, Angled Base and Oversized Carpet Casters is meant to provide breathable comfort while users work. Its Air Grid seat and back have a built-in lumbar support system, while the chair comes complete with a limited lifetime warranty, ensuring that it will be enjoyed for years to come. Additionally, user control is emphasized through its 2-to-1 syncro tilt control feature and its one-touch pneumatic seat height adjustment, giving anyone the ability to conform this chair to their needs.