Beautifully upholstered in Black Leather Plus. LeatherPlus is leather that is polyurethane infused for added softness and durability. Pillow Top Design with a perforated center. Padded armrests covered with Caressoft upholstery. Adjustable tilt tension control. Pneumatic gas lift seat height adjustment. Large 27" nylon base for greater stability. Hooded double wheel casters.. Optional knee-tilt mechanism available model (B7602).