Steer your way to enhanced comfort and productivity with the Pump Office Chair. Ergonomically designed, Pump comes with built-in lumbar support, breathable mesh back, nylon base and dual-wheel casters for easy movement over hardwood or carpeted surfaces, 360-degree swivel, height adjustable seat and armrests, and a tilt tension control knob with four locking positions. Pump also comes with a plush 3.5 inch padded foam seat cushion, making this an office chair rich in both visual appeal and versatility.