3D ERGONOMIC DESIGN: Unlike other office chairs, this ergonomic desk chair uses split lumbar support. The special lumbar cushion design reduces waist pressure, which can effectively prevent lumbar spine injuries, and the bionic curve design makes your neck and back , the waist presents an S-shaped curve to correct your sitting posture. This ergonomic computer chair is very suitable for people who work for a long time [FOOTREST TO RELAX YOUR FEET] - Sitting at work for a long time will cause your feet to become numb. Dont worry, our branch ergonomic chair has a retractable footrest and a 90-135°tilt mechanism to create a comfortable resting environment for you, increasing blood flow in the legs. [4D ARMREST SUPPORT] - We have upgraded the armrests of ergonomic office chair. You can adjust the angle of the armrests up and down, front and back, and left and right to find the most comfortable position to provide support for your arms at work. Mesh office chairs with lumbar support ar