In {HEAD ~ one embodiment}, an inner layer of {TAIL ~ the multi layer substrate} can be provided with perforations 
In { HEAD ~ one embodiment } , an inner layer of { TAIL ~ the multi layer substrate } can be provided with perforations
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH