Four separate gel-filled pads guarantee stability * Water-based gel relieves pressure and cools the skin to prevent breakdown caused by perspiration * Side gel pods improve lateral stability by controlling left-right leaning * High-density foam adds comfort and prevents bottoming out * Low-Shear outer cover reduces skin-damaging friction * Rear gel pod provides pressure relief in the coccyx area * Incontinent-proof vinyl cover prevents urine from entering cushion * Wipes clean for easy care * Front gel pod controls forward sliding by eliminating posterior pelvic rotation * Safety strap keeps cushion in place *