{HEAD ~ a pressure sensitive adhesive layer} which covers substantially {TAIL ~ the entire inner surface} of the material layer, 
covers substantially
{ HEAD ~ a pressure sensitive adhesive layer } which covers substantially { TAIL ~ the entire inner surface } of the material layer ,
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH