I've seen a few different foam bodied muskie baits out there (Hookers, Mantas, etc) and like the idea of that construction of bait. Does anyone know what kind of foam is used for it? It appears to be a very high density product. I did some searching here and came up with info on the silicone type molds but any info I've found with links they haven't worked for me. Can some one point me in right direction?