The Kinetic High Back Chair is the Pinnacle of Italian Design and Movement Engineering. No longer does the user have to adapt to the chair. The unique A-Synchron mechanism allows the seat & back to move independently of each other, while also allowing the user to swing while seated. The chair will follow your precise movement all day long. If you need to lock the seat back independently, you can. The chair is standard with integrated Seat Slide allowing the seat depth to vary from 46cm to 52cm .