a breathable film involving at least one polymeric layer of 100 % neutralized ionomer containing sufficient aliphatic , mono - functional organic acid salt to essentially triple the oxygen transmission value and / or at least one polymeric layer of metallocene polyethylene optional blended with low density polyethylene and preferably in combination with one or more outer layers of highly neutralized ionomer . such polymeric film and polymeric film structure has sufficient oxygen permeability , water vapor transmission , formability , and structural strength to be useful in wrapping food products requiring breathable films such as case ready meat , fish , sausage , fresh produce , and the like .