The second yarn 24 comprises {TAIL ~ a core} 34 of elastic material such as rubber which is helically wrapped with an inner covering 36 defined by a fiber or filament such as {HEAD ~ polyester} 
The second yarn 24 comprises { TAIL ~ a core } 34 of elastic material such as rubber which is helically wrapped with an inner covering 36 defined by a fiber or filament such as { HEAD ~ polyester }
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL 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