Laminated cook-in film

A multilayer structure comprising a first polymeric film laminated to a second polymeric film constructed separately from the first polymeric film, wherein: a, between the first and second polymeric films, can be contracted by heat, and other, between the first and second polymeric films, can not contract by heat; at least one of said first and second polymeric films, is a barrier film having an oxygen permeance of no more than 150 cm3 / m2 or atm or 24 hours at 23 ° C and 0% relative humidity ( according to ASTM 3985); said first polymeric film comprises: a first outer layer of polymer film, even when untreated, has a surface energy of at least 0, 034 J / m2; and at least 10 percent by weight of one or more polymers having a Vicat softening point of at least about 65 ° C; said first polymeric film outer layer forms a first outer surface of said multilayer structure; and said second polymeric film comprises an outer layer of the second polymer film, forming a second external surface of said multilayer structure.