The loop yarn can be a spun yarn made by any available spinning technique, or {HEAD ~ a filament yarn} made by {TAIL ~ extrusion} 
made by
The loop yarn can be a spun yarn made by any available spinning technique , or { HEAD ~ a filament yarn } made by { TAIL ~ extrusion }
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 TAIL TAIL TAIL TAIL TAIL