The self aligning zipper 23, wherein {TAIL ~ said first lower body} further comprises {HEAD ~ a first alignment feature} 
The self aligning zipper 23 , wherein { TAIL ~ said first lower body } further comprises { HEAD ~ a first alignment feature }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD