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