Office chair can satisfy all your daily needs. Ergonomically designed with a highly ventilated mesh back, a soft moderate sponge cushion will fit into your sitting position for a long time you won't feel tired. The bottom of the desk chair is equipped with a tension adjusting knob to provide a certain degree of tilt so that you can relax after work. The adjusting lever can help you adjust the height of the seat so that the chair can reach your ideal height. Assembly tools are included.