the invention provides improved film structure and bags made therefrom for use in sterile packaging , wherein the package and product are sterilized after the process of filling and sealing the bag . the improved structure is a 3 - layer coextruded film comprising a first layer of propylene ethylene copolymer , a second layer on one surface of the first layer and comprising a blend of propylene ethylene copolymer with linear low density polyethylene , and a third layer of linear low density polyethylene on the opposing surface of the second layer . the blend composition is 20 % to 80 % propylene ethylene copolymer and 80 % to 20 % linear low density polyethylene .