In the preferred embodiment, {HEAD ~ the fabric cover} 30 and cuff 40 extends completely about {TAIL ~ the periphery} of the core 20 
extends completely about
In the preferred embodiment , { HEAD ~ the fabric cover } 30 and cuff 40 extends completely about { TAIL ~ the periphery } of the core 20
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH