copolymers of ethylene and alpha olefins that have been formed by a polymerization reaction in the presence of a single site catalyst , such as a metallocene , are used as a film or as a layer in multiple layer films , including molecularly oriented and irradiated heat shrinkable films . novel blends of the copolymers with other polymeric materials are disclosed and used as a film or a layer in a film particularly in molecularly oriented and heat shrinkable films . bags made from the multiple layer films are especially useful for shrink packaging primal cuts of meat . processes for the formation of flexible films and packages made therefrom are also disclosed .