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