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