BOSS Chairs HI-BACK CARESSOFT CHAIR Beautifully upholstered with ultra soft and durable Caressoft upholstery. Executive High Back styling with extra lumbar support. Padded armrests covered with Caressoft upholstered. Large 27" nylon base for greater stability. Upright locking position. Pneumatic gas lift seat height adjustment. Adjustable tilt tension control. Hooded double wheel casters. Matching guest chair model (B7909).