{HEAD ~ The inner core} can be comprised of {TAIL ~ cork}, kapok, rubber or a blend of thermoplastic polymers and copolymers 
comprised of
{ HEAD ~ The inner core } can be comprised of { TAIL ~ cork } , kapok , rubber or a blend of thermoplastic polymers and copolymers
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH