FeaturesFour separate gel-filled chambers guarantee stability Water-based gel relieves pressure and cools the skin to prevent breakdown caused by perspiration Side gel improves lateral stability by controlling left-right leaning High-density foam adds comfort and prevents bottoming out Low-Shear outer cover reduces skin-damaging friction Front gel controls forward sliding by eliminating posterior pelvic rotation Rear gel provides pressure relief in the coccyx area Incontinent-proof vinyl cover prevents urine from entering cushion Wipes clean for easy care Safety strap keeps cushion in place SpecificationsManufacturer Skil-Care Application Seat Cushion Color Black Cover Material Vinyl Cover Dimensions 16 X 16 X 2-1/2 Inch Inflation Type Non-inflatable Material Gel / Foam 1 Each / Each