The High-Back Multi-Function Task Chair from Boss keeps you comfortable while you work. This high-back chair comes upholstered with commercial-grade polyester fabric. The waterfall seat helps eliminate leg fatigue and features molded foam padding that contours to the shape of your body. A ratchet-back height-adjustment mechanism lets you position the back cushion and lumbar support, and polyurethane-padded armrests adjust in both height and width. Use the pneumatic gas lift to change the height of your seat. You can also independently adjust your seat and back angles and lock them into position using the multi-function tilting mechanism. Rolls easily on five dual-wheel casters.