The structure of the chair is the result of 10 years of ergonomic design, including an optimum curve that perfectly supports your spine. If you need to tweak it, simply press or pull the handle to raise or lower the chair, press the angle lever and lean back to adjust to 135-degrees, or reposition the 3D-adjustable armrests to your liking. Finished with PU covering, the DXRacer Formula series puts you in the middle of the action and keeps you comfortably there. It also comes with neck and lumbar pillows for added support.