The i29s patented floating lumbar and pelvic support system and intuitive controls, users of any size and shape get 24/7 support and dynamic movement from the moment they sit in the i29. The ultimate ergonomic office chair for anyone with back pain or injuries. The i29 boasts one of the most intuitive mechanisms on the market. With three easy-to use pictorial controls on the right-hand side operating seat height, seat depth and advanced dynamic movement, the mechanism can also be locked at any angle. Hoods fully patented floating lumbar support automatically moves with you when in dynamic mode, giving continuous lumbar support. The chairs split back is designed to deliver independent upper back support as well as ensuring the patented lumbar system protects the lower regions keeping the users pelvis rotated. The back can easily be height adjusted for each users anthropometric measurements by releasing two buttons on the back of the chair. Suitable for people from 8.5 to 23.5st. T