20 X 18 * 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 * Adjustable to individual?s shape and weight * Cushion is adjustable to changes in individual?s position over time * Lightweight & easy to handle and carry * Cushion can be easily cleaned with soap and water * Cover is machine washable * Flame-resistant black neoprene (not made with natural rubber latex) support pad can be patched to extend use * Separated air cells allow air circulation to reach the surface of the skin *