. "yamide, and the like; preferably, it is a woven substrate comprising polyamide fibers), and embedded within one or more adhesive layers 115, to which is attached a stabilizing layer 116 (such as a glass mat), and a foam or cushion layer 118 (which may be a fabric, such as a felt, or resin, such as polyvinyl chloride other like compound; preferably, it is polyurethane foam)." . . .