Ergonomic Computer Desk Chair For The Home With A Mesh Mid-Back And An Armrest Ergonomic Office Chair: Ergonomic mesh back perfectly fits the shape of the curved human spine, providing you with all-day comfort. Breathable Material: The back and cushion positions are made of breathable skin-friendly mesh. The breathable mesh material allows body heat and air pass through the back, avoiding sweat and maintaining a cool body temperature. Adjustable Desk Chair: Adjustable chair raises and lowers the seat using the adjustment lever, conveniently located under the seat. The rocking mode can relax you from heavy work, pull out the handle to start rocking and pull it in to stop. This chair can support up to 250 lbs of weight. Our office chair very easy to set up, it comes with all hardware necessary tools. And we offer the installation instructions and video to help you.