Beautifully upholstered in LeatherPlus. LeatherPlus is leather and polyurethane for added softness and durability. Firm molded polyurethane Black Arms. Dacron filled top cushions for added comfort. Upright locking position. Pneumatic gas lift seat height adjustment. Adjustable tilt-tension control. Large 27'' nylon base for greater stability. Hooded double wheel casters.