Free  adjusting headrest: Want to sit all day without any discomfort on the  shoulder and neck? This high back mesh chair is able to substantially  reduce the daily pain on the neck and shoulder since it comes with an  adjustable headrest that allows to rotate to a specific angle and go  up/down to a suitable height. And headrest can also be removed anytime  you don't need it. Adjustable  3D armrest: This contemporary office chair features 3D adjustable  armrests - go forwards and back, up and down, and rotate 20 degrees for  the best fit to your favorite position. No matter in appearance or  function, it makes perfect sense of technology and the future. It is the  small design detail that always brings some fun and satisfaction to  your office life. Ergonomic  lumbar support: This mesh task chair has excellent lumbar support at  the low place of the back. It fits closely to our low back all the time  to greatly reduce spine fatigue. This improved design on this office  chair is undoubtedly the ideal match for people who work or play games  on the computer for long hours. Breathable  and soft mesh: Preventing one from sweating or heat when sitting for  hours, This ergonomic office chair with fabric mesh design gives the  perfect option to keep full airflow on the head, back and bottom. And  what's more, the mesh material used is not hard and brittle but flexible  and friendly, so don't need to worry that there would be wiry mesh  marks hurting anything. Straightforward  installation: The installation instructions and accessories are  included in the box. The instructions are easy to understand. And to  assemble the chair requires no extra tools and fittings from your side.  Just need no more than 30 minutes for an adult to put it together. If  necessary, please contact us for the installation video. Casters: Yes Compatible Flooring: Tile; Carpet; Hardwood; Linoleum; High Pile Carpet; Medium Pile Carpet; Low Pile Carpet Product Details Weight Capacity:  250.00 lb.