In {HEAD ~ some embodiments}, {TAIL ~ the cover} may be particularly configured about the core to form the cuff 
In { HEAD ~ some embodiments } , { TAIL ~ the cover } may be particularly configured about the core to form the cuff
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH