The SPACE Seating Fully Adjustable 521 Series Premium Office Chair is designed to provide exceptional support for hard-working professionals in your office. The vertical mesh back with built-in lumbar support keep you cool and poised even after working long hours to meet a deadline. Generously padded breathable mesh seating ensures long-lasting comfort and style. Equipped with key features that assist to accommodate individual needs such as: easy one-touch pneumatic seat height adjustment, smooth transitioning 2-to-1 synchro tilt control with adjustable tilt tension and seat slider, and helpful height adjustable arms with polyurethane foam padding. Set upon a heavy-duty silver chrome angled base with oversized dual wheel carpet casters that deliver easy mobility.