Big & Tall Mesh Back Chair features a high weight capacity to welcome more users & a breathable mesh back with built-in lumbar support for conforming comfort. Other comfort features include pneumatic seat-height adjustment from 17-3/4" to 19-5/8", back-height adjustment, seat-glide mechanism, 360-degree swivel, tilt, tilt tension & multi-task control. Polyurethane-padded arms pivot & adjust in height to optimize your position. Metal base is equipped with smooth-rolling dual-wheel casters. Cushioned seat is upholstered in fabric. Weight capacity is 350 lb.