{HEAD ~ The material} of {TAIL ~ the inner liner} is folded over at opposite edges to form increased thickness margins at opposite ends of the pack 
of
{ HEAD ~ The material } of { TAIL ~ the inner liner } is folded over at opposite edges to form increased thickness margins at opposite ends of the pack
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH