This Chair is a blend of comfort, support and mobility. Backrest and seat cover are made of a lightweight breathable black mesh fabric upholstery. The mid backrest provides a sturdy support for your back and the generously padded seat adds another layer of contoured comfort during those long workdays. Easily adjust the height of your chair with the convenient pneumatic lift lever to customize chair to fit you A durable 5-star base will withstand years of wear and tear with a textured finish. Durable caster wheels roll smoothly around the room .