Not any old set of curves will do, but the curves that make up the Techni Mobili Comfy Rolling Mesh Task Chair with Arms and Wheels are designed for comfort and support. The good looks are just a bonus. That ergonomic shape starts with a thick, foam-cushioned seat and a pair of curved arms on either side. The mesh backrest offers comfort and lumbar support while also creating a breathable surface that keeps you from getting a sweaty back as you work. A pneumatic height-adjustment system lets you raise and lower the seat, and a simple knob adjusts the tilt of the chair. The powder-coated steel base rides on five heavy-duty casters for easy motion on almost any kind of surface.