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