Preferably the first synthetic material is an aramide filament, and preferably {TAIL ~ the second synthetic material} is {HEAD ~ a pre oxidized filament} 
Preferably the first synthetic material is an aramide filament , and preferably { TAIL ~ the second synthetic material } is { HEAD ~ a pre oxidized filament }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD