In the construction illustrated as an example of a detachable construction a base attachment piece 432 U shaped in section extends over the whole of {TAIL ~ the circumferential edge} of the extensible elastic surface cover 43, and the attachment piece 432 can simply be attached to or detached from the whole of the circumferential edge of the headrest 3 by {HEAD ~ hand} 
In the construction illustrated as an example of a detachable construction a base attachment piece 432 U shaped in section extends over the whole of { TAIL ~ the circumferential edge } of the extensible elastic surface cover 43 , and the attachment piece 432 can simply be attached to or detached from the whole of the circumferential edge of the headrest 3 by { HEAD ~ hand }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD