The pelvis is the center of our body. Free movement of the pelvis is very important as that's where lower limbs and upper body mobility begins. The movable seat on SpinaliS chairs allows for movement in all directions, assuring the unique mobility of the pelvis and therefore the entire body. In addition, it ensures the correct position of the spine. Sitting on a chair with a fixed seat doesn't allow for any movement of the lower part of your body, which is very limiting.