Thick Padded Contour Mesh Seat and Deluxe Breathable Mesh Back.Adjustable Lumbar Support.Height and Depth Adjustable Headrest.Pneumatic Seat Height Adjustment.Infinite Locking 2-to-1 synchro Knee Tilt Control.Height Adjustable Arms with PU Pads.Heavy Duty Gunmetal Finish Base with Oversized Dual Wheel Carpet Casters.