Unsurpassed up-to-the-minute ergonomic design arrives in the form of the REVV Series Self-Adjusting SpaceFlex Back Chair Intelligently outfitted with a firm yet flexible cut out style contoured back, the backrest of this ingenious seating solution provides for optimal support while sporting cutting edge style Brilliantly constructed with a thickly padded 2-layer mesh seat and engineered with pressurized seat height adjustment and tilt tension with anti-kickback Overall size: 27.25 W x 24.5 D x 44.25 H Approved for commercial use - This chair meets or exceeds ANSI/BIFMA standards