{HEAD ~ This visor} can be used to provide {TAIL ~ shade} for the eyes of the user 
used to provide
{ HEAD ~ This visor } can be used to provide { TAIL ~ shade } for the eyes of the user
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH