Ergonomic design---------- The ergonomic S-shaped backrest adapts perfectly to your spine. These adjustments protect your spine and lumbar vertebrae while guaranteeing comfort and relaxation when working, studying or resting. ---------- Tilt function---------- The backrest tilt angle is 90-127°. So it can simply be tilted back to relax after, before or during work. When you need to rest or relax, you can hug the backrest, lock it in place and gently rock back and forth to relieve back pain or relax the mind. ---------- Adjustability---------- The height of the headrest is adjustable by 29 cm and a 45° angle of rotation to relieve neck strain. It's easy to adjust the armrests from bottom to top by 9 cm or from front to back by 4 cm by pressing the black buttons on the armrest. ---------- Cousin comfort---------- The cushion is filled with high-density foam covered with a hard-wearing, breathable fabric. It's very comfortable to sit on and won't deform after a long sitting posture. Seat depth adjustable from 45 cm.