Skil Care-751024-Gel-Foam Gel-Foam 20" Cushion with Coccyx Cutout & LSI CoverGel Foam Gel Foam Cushion (classic) A chair cushion that enjoys all the advantages of gel such as cooling. Alternating pressure. The gel pad is sandwiched between an upper and lower layer of foam that provides pressure relief and redistribution. relief and redistribution. Water based gel lowers interface pressure and cools to minimize perspiration. High density foam prevents bottoming out. Vinyl cover wipes clean for easy care and prevents urine from