Breathable ProGrid Back with Built-in Lumbar Support.One Touch Pneumatic Seat Height Adjustment.Deluxe 3-Position Locking 2-to-1 Synchro Tilt Control with Seat Slider.Mesh Saddle Seat with Molded Foam Seat.Available in Coal FreeFlex or your Choice of Custom Fabric.3 Way Adjustable Arms with PU Pads.Height, Width & Depth Heavy Duty Nylon Base with Dual Wheel Carpet Casters.This product has received GREENGUARD Certification.