This mesh-back chair supports the way you really work. Its infinite support lumbar technology provides back support while perching to support your back at any sitting position with a simple touch of a button. Dual-action synchro tilt allows the back to reline at a 2-to-1 ratio to seat angle so you can recline while keeping the seat cushion relatively level to the floor. Cantilever arms flip up and out of the way when you need more room. Comfort functions include pneumatic seat-height adjustment, 360-degree swivel, tilt tension and tilt lock. Five-star base is equipped with hooded, dual-wheel 50mm plastic casters for easy chair movement. Weight capacity is 250 lb. Chair is endorsed by the American Chiropractic Association.