This Furmax Office Desk Chair is the perfect addition to any workspace. It features an ergonomic design with an air layer spinal structure back support to better fit your spine and reduce stress on the spine and relieve muscle soreness. The seat is made of high-quality thick sponge and breathable mesh fabric for extra comfort. It has a high-quality and durable base with a maximum capacity of 260 pounds and 360-degree rotating casters for quiet and silent movement. It also has one-key seat height adjustment, flip armrest design, and hand-rocking adjustment of seat back to fit your various sitting postures. The chair is lightweight and easy to assemble with a detailed installation manual and installation tools. Follow the manual and the installation can be completed in only 15-20 minutes.