Of course other types of {HEAD ~ fasteners}, including snaps, {TAIL ~ buttons}, buckles and the like, may be used to hold the strap 20A securely but comfortably around the head of the user 
Of course other types of { HEAD ~ fasteners } , including snaps , { TAIL ~ buttons } , buckles and the like , may be used to hold the strap 20A securely but comfortably around the head of the user
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH REL OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH