Contour Self Skinned Urethane Seat and Back with Builtin Lumbar Support One Touch Pneumatic Seat Height Adjustment Back Height Adjustment Heavy Duty Nylon Base with Dual Wheel Carpet CastersContour SelfSkinned Urethane Seat and Back with BuiltinOne Touch Pneumatic Seat Height AdjustmentBack Height AdjustmentHeavy Duty Nylon Base with Dual Wheel Carpet CastersGREENGUARD Indoor Air Quality Certified