Comfort Shield® Incontinent Care Wipe, 3 per Pack, 1 Box of 50 Mattress Covers 20 X 18 * The 7318 DS SLV 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 12 Long Small * Measurement 6 below knee: 9 Help clean Each three in one cloth contains a long lasting 3% dimethicone barrier cream to seal out wetness