AirGrid Back and Mesh Seat Managers Chair features active lumbar support and a mesh screen back. Mesh screen back provides increased breathability while adjustable, padded lumbar support maintains the natural curve of your spine. Functions include one-touch pneumatic seat-height adjustment, 360-degree swivel, tilt, tilt tension, tilt lock and synchronized knee tilt (2-to-1 synchro tilt). Headrest adjusts in height and depth. Arms have soft pads and adjust in height. High-back chair features a thickly padded contoured mesh seat, heavy-duty metal base, and oversized, dual-wheel carpet casters.