{TAIL ~ The insert member} fits within a sleeve member which is formed of {HEAD ~ a semiresilient material} capable of maintaining its shape at rest but capable of being flexed when subjected to a force 
{ TAIL ~ The insert member } fits within a sleeve member which is formed of { HEAD ~ a semiresilient material } capable of maintaining its shape at rest but capable of being flexed when subjected to a force
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH