A layer of acrylic adhesive (Layer F) 40 is applied on the surface of the heating core 72, and more specifically, on the surface of the silver conductor layer 38 so as to adhesively bond a closed cell foam (Layer G) 42, formed from a material such as neoprene or urethane, and the like thereon. [0021] Layer A or the reinforcement mesh layer 30 may be made of any suitable material, but is preferably