[Ergonomic Lockable Auto-following Lumbar Support] Newtral office chair uses innovative automatic lumbar tracking technology to automatically follow the movement of your lumbar spine, providing strong support for your lower back throughout the day. Lumbar support strength can be adjusted according to your needs. It fits the natural curvature of your spine and helps relieve back pain caused by sitting for too long. [Personalized Comfort in A Glance] The back of the Newtral ergonomic chair has three height options, and it can be tilted and locked from 96° to 126°. The angle and height of the headrest are adjustable. The seat can be lifted up and down, moved back and forth, also equided with the 3D adjustable armrest. You can find the most comfortable support position and strength for your body, whether you are working, playing games or resting. [American Ergonomist Endorsement] IRIS SOKOL, Founder of Ergowell, LLC,The lumbar function in the NEWTRAL Chair is one of the most unique l