Bow Tie Pillow Blue by Alex Orthopedic Wound Care 38 42 * Both provide Color:Yellow 38 42 * Both provide excellent abdominal and LS Support * Duo Tension straps customize compression and support * Flexible stays help prevent rolling and provide additional support * All elastic for most compression and support * Color: Beige * Measurement is hip circumference 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 Removable pillow case included Fiber filled angular shaped pillow