{HEAD ~ The rubber thread} 2, wherein {TAIL ~ said second rubber portion} comprises between 2% and 80% of said rubber thread by weight 
wherein
{ HEAD ~ The rubber thread } 2 , wherein { TAIL ~ said second rubber portion } comprises between 2 % and 80 % of said rubber thread by weight
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH