STYLE, DURABILITY AND COMFORT All of our Ergo chairs were engineered with your total comfort in mind. Aesthetics, form and function are merged seamlessly in a single design, and allows the Ergo chairs to be minutely adjusted to achieve unrivaled ergonomic fine tuning. A synchro-tilt mechanism with infinite lock, sliding seat, pneumatic height adjustment, and headrest are options on all Ergo models. Tilt Tension Control Tilt Lock Back Angle Adjustment Synchro-Tilt Seat Height Adjustment Waterfall Seat Back Height Adjustment Seat Depth Adjustment Arm Height Adjustment Swivel Arm Arm Depth Adjustment Adjustable Headrest on High-Back Model Greenguard Certified Overall Dimensions: 26.5" x 29" x 46-52" (W x D x H) Seat: 20.5" x 18.5" (W x D) Back: 20.5" x 28" (W x H) Seat Height: 19.3" (at lowest point) 24" (at highest point) Weight: 66 lbs