Infinity Executive Chair features advanced lumbar support and bonded leather upholstery for a professional look and feel. Infinite support lumbar technology provides back support while perching. With the simple touch of the fingertip control, the back will move forward to support you at any sitting position. Posture mechanism lets the back angle adjust independently of the seat and can be locked in an infinite number of positions. Other customizing comfort functions include pneumatic seat-height adjustment from 20-1/2" to 23-1/2", 360-degree swivel, tilt, tilt tension and tilt lock. The 23" wide x 18" deep seat has 7-1/4" seat cushion while the 21-1/4" wide x 31-1/2" high back has a 7" headrest cushion. Five-star nylon base is equipped with hooded, dual-wheel, 50mm casters. Weight capacity is 275 lb. Chair is endorsed by the American Chiropractic Association.