Preferably the fibers are cracked whereby they exhibit highly reflective surfaces especially useful in {HEAD ~ the reflection} of {TAIL ~ heat} produced by a fire 
of
Preferably the fibers are cracked whereby they exhibit highly reflective surfaces especially useful in { HEAD ~ the reflection } of { TAIL ~ heat } produced by a fire
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH