ERGONOMIC DESIGN: The overall design of our office chair is ergonomic, with a lumbar support on the back of the chair. When you lean back in the chair, it's as if hands are supporting your waist. This chair can effectively relieve back pain caused by long - term sitting, which will be a very wonderful experience for you to use. CONVENIENT MOBILITY: The chair's 360° swivel base allows you to easily rotate while sitting. Its silent rollers can move smoothly in any direction and are ideal for hard floors. Enjoy quiet and comfortable mobility in your office space. This chair can be used as a student office chair, a computer chair, an ergonomic chair, a desk chair, or a gaming chair. MULTIFUNCTIONAL MECHANISM: The seat height of our work chair can be adjusted by the handle on the lower right side of the seat to meet desks of different heights. With a rocking mode of 90° to 120°, you can lean back to relax, switch sitting positions, and adjust the tilt angle by twisting the tens