High-back chair features an open back design that creates a contemporary aesthetic. The simple, understandable controls include seat height to fit your body and center-tilt to provide comfort. High-back frame with support bar delivers substantial, long-lasting support. Contoured mesh back is ergonomically sculpted to increase lower back support. Breathable mesh back conforms to the upper body for added comfort. Cushioned seat is covered with black sandwich mesh. Fixed loop arms provide added comfort. Functions include pneumatic seat-height adjustment from 17" to 21", 360-degree swivel, tilt tension and tilt lock. Five-star base is equipped with casters for easy chair movement.