Ergonomic Lumbar Support - The mesh backrest, made of porous material, offers you a breathable feel. The sturdy backrest frame supports the natural curve of the spine, allowing you to maintain a good sitting posture..Comfortable Seat - The seat cushion is made of high-quality mesh. It’s firm yet soft enough to prevent excessive stress placed on your pelvis and comfortable enough to support your sitting for prolonged periods of time..Ergonomic 3D Armrests & Adjustable Headrest- The 3D adjustable armrests can go forwards, back, sideways, up, and down, which helps reduce the tension in the upper body and allow the shoulders and arms to relax. Headrest with adjustable height and angle, easy to adjust to meet different needs..Recline & Lock Function - The backrest can be tilted back and recline range is from 90 to 117°. Plus, you can recline and lock that position at any angle within that range. It allows you to take a quick nap during your breaks..Height Adjustable - The height of this 360°Rotating chair could be easily adjusted by the pneumatic adjustment lever, which allows you to pick the appropriate level for long-term comfort. It is perfect for the office, bedroom, study room, living room, or gaming room..Smooth Movement & Stability - Our comfy office chair comes with smooth, multi-direction casters, which allow you to move the chair around with zero effort. It could run smoothly on tile, wooden floors, carpets, and other floorings. The large 5-star base increases stability even at the full height range. The maximum weight capacity is 300 lbs..Rest Assured to Purchase - Assembling this chair is fairly easy. (About 20 minutes). And the instructions are easy to follow. We have a professional customer service team. If you have any questions about the product, please do not hesitate to contact us.