{HEAD ~ The cover} can be formed of {TAIL ~ a polymer blend} including a polyurethane composition and the core can include a polybutadiene composition 
formed of
{ HEAD ~ The cover } can be formed of { TAIL ~ a polymer blend } including a polyurethane composition and the core can include a polybutadiene composition
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH