The backrest and cushion of our office chairs have been upgraded with added flexibility and thickness. Besides, you can pull out the wrench and adjust the tension knob under the cushion to adjust the angle of the chair rocking back and forth, with a maximum angle of 90°~120°. You can also adjust the lift switch to achieve the most comfortable height. Through different adjustment modes to adapt to your various needs, giving you the most comfortable feeling. What's more, the wheels are made of smooth and silent material, which can move freely in different scenes and protect the floor from scratches.