The unique Knox Black Walnut Office Chair has a contoured seat and back made from walnut-colored bentwood covered with black LeatherSoft upholstery. LeatherSoft is leather with polyurethane for added softness and durability. This modern office chair supports up to 250 lbs with its chromed metal base and dual wheel casters. It has a swivel seat, pneumatic seat height adjustment, tilt tension knob and a tilt lock mechanism. It also features CA117 fire retardant foam for added comfort.