About this item 360-degree silent rotationMesh office chair,the new heavy-duty metal base and 360-degree rotatable nylon smooth rolling casters can be easily moved to other place,providing us with great stability and mobility when using the office chair,to a certain extent to avoid scratching the floor,but also do not have to worry about disturbing others to rest. Ergonomics & New Patent DesignThis adjustable office chair includes lumbar support and height and tilt adjustable features that allow you to tilt the backrest back or sit up straight.Adjustable seat tilt angle and adjustable height,it provides a larger weight-bearing area and can reduce body pain.Now you can quickly find a position that makes your back feel most comfortable! Lasting comfort experienceThe ergonomic mesh back panel allows air,body temperature and water vapor to pass through,away from the heat and humidity build-up close to the body.It can provide good lumbar support to make you feel comfortable for long time us