Breathable Light AirGrid Back with Built-In Lumbar Support.Thick Padded Bonded Leather Seat Pneumatic Seat.Height Adjustment 2-to-1 Synchro Tilt Control with Adjustable Tilt Tension.Platinum Coated Padded Flip Arms with PU Pads.Heavy Duty Angled Platinum Finish Base with Oversized Dual Wheel Carpet Casters.