: Hbada P3 Ergonomic office chair is designed to provide maximum comfort and support, with ergonomic features such as 2D adjustable lumbar support, adjustable headrest and liftable armrest. It's easy to adjust seat height, headrest, backrest and arms to meet different needs, good for sitting long hours. - : An office chair with proper support always maintain a healthy spine posture and will not have a damaging and flattening effect on your back. Good 2D lumbar support will minimize strain or pain on the lumbar discs in your spine, which also can lift 1.8'' and rotate 45° to place your wasit in a proper sitting posture. The adjustable headrest prevents you from hunching forward, scrunching your shoulders. Don't be slouching, this is the culprit. : If you will be spending a lot of time in it, an adjustable office chair is your best bet. Hbada desk chair allows lifting