Gene Executive Chair offers convenient comfort features so you can sit smarter and enjoy an easier workday. Mesh back offers breathability. Both arms and seat adjust for better positioning. To easily raise and lower the cushioned seat fabric-upholstered in black, lift up on the handle. Arms adjust by pushing the side button on the arms and raise or lower to your preferred level. Adjust the tilt tension control by turning a front button below the seat on the right side. The tilt lock button is on the left side below the seat for easy access. Activate the synchro tilt by pulling out the paddle below the seat. This will allow the chair to float freely in a rocking motion. Executive chair rolls easily on five casters. Seat measures 19-7/10" wide x 16-9/10" deep x 17" to 21" high. Red mesh back measures 17-7/10" wide x 26" high.