Boss Office Products B305 Posture Task Chair without Arms in Black Beautifully upholstered in LeatherPlus LeatherPlus is leather that has been infused with polyurethane for added softness and durability Thick padded seat and back with built-in lumbar support; Pneumatic seat height adjustment Waterfall seat reduces stress to your legs; Adjustable depth back 5 star nylon base allows smooth movement and stability; Hooded double wheel casters Armless task chair from Boss for supportive, comfortable seating Handsomely upholstered in black LeatherPlus and thickly padded Built-in lumbar support and waterfall seat for reducing stress to legs Back height and depth are fully adjustable; pneumatic seat height adjustment 5-star nylon base for stability and easy movement; hooded double casters