Boss Office Products B7641 High Back Leather Plus Chair in Black Beautifully upholstered in black LeatherPlus LeatherPlus is leather that is polyurethane infused for added softness and durability Passive ergonomic seating with built-in lumbar support; Upright locking position Pneumatic gas lift seat height adjustment; Adjustable tilt tension control Large 27" nylon base for greater stability; Hooded double wheel casters