Merax High Back Mesh Chair Office Chair Computer Gaming Chair Metting Chair(High back mesh 3) Ergonomic design provide a evenly support of the back so that the spine without creating pressure points 2-to-1 Synchro Tilt Control with Adjustable Tilt Tension.Rocks from back and forth 360 Swivel Seat Contoured and breathable mesh back Pneumatic Seat Height Adjustment