The fibers to be used are selected from synthetic fibers, semi synthetic fibers, {HEAD ~ regenerated fibers} and {TAIL ~ natural proteinaceous fibers} 
The fibers to be used are selected from synthetic fibers , semi synthetic fibers , { HEAD ~ regenerated fibers } and { TAIL ~ natural proteinaceous fibers }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL