Lumex Lightest Foam Gel Overlay 42x80x4 Marketing Bows Features a comfortable topper with APWAP9559 Features a comfortable topper with a higher density base foam Features a specialized Dura Gel™ center layer surrounded by comfortable foam layers on the top and bottom of the cushion The cover is a 600 denier nylon with a fluid resistant backing to provide excellent durability longer than standard) the overlay is effective in any bed position Our non aqueous gel will not migrate or leak like water based gel products Overlay delivers same consistent results over the lifetime of the product Light weight feature reduces shipping costs Cover is fluid resistant convoluted top to provide maximum comfort and pressure management Overlay reduces body interface pressure and provides a comfort at critical points over a wide range of body shapes and sizes Since the gel will not migrate or pool