Beautifully upholstered in LeatherPlus. LeatherPlus is leather and polyurethane for added softness and durability. Passive ergonomic seating with built-in lumbar support. Hardwood arms with upholstered pads. Upright locking position. Pneumatic gas lift seat height adjustment. Adjustable tilt-tension control. Large 27'' hardwood caps steel base for greater stability. Hooded double wheel casters.