• Self Adjusting SpaceFlex® Backrest Support System in Raven • Thick Padded Mesh Seat in Raven • Pneumatic Seat Height Adjustment • 2-to-1 Synchro Tilt Control with Adjustable Tilt Tension • Height-Adjustable Arms with PU Pads • Heavy Duty Angled Gunmetal Finish Base with Oversized Dual Wheel Carpet Casters • GREENGUARD Indoor Air Quality Certified®