The contoured design combined with the simple operation of the ISOFLO� Memory Control unit offers provides a new level of postural control and stability that has never been achieved in an air cushion. * The contoured design positions the pelvis back in the wheelchair and centers the individual comfortably in the middle of cushion. * The ISOFLO Memory Control unit locks air into each of the four compartments providing stability by minimizing side-to-side and front to back motion. *