The first material is selected from the group consisting of cork, kapok, rubber, or a thermoplastic resin such as an ethylene vinyl acetate copolymer, an ethylene acrylic acid copolymer or {HEAD ~ a blend} of {TAIL ~ both} 
of
The first material is selected from the group consisting of cork , kapok , rubber , or a thermoplastic resin such as an ethylene vinyl acetate copolymer , an ethylene acrylic acid copolymer or { HEAD ~ a blend } of { TAIL ~ both }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL