a spring for urging {HEAD ~ the second end portions} of the pair of hair retainers in {TAIL ~ a closing direction} thereof, 
in
a spring for urging { HEAD ~ the second end portions } of the pair of hair retainers in { TAIL ~ a closing direction } thereof ,
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH