Abstract: Polymer compositions, single layer films and multiple layer films, where the composition and/or a layer of a film has base polymer of either amorphous nylon or EVOH, and a modifying semi-crystalline nylon component. Where the base polymer is amorphous nylon, the modifying nylon composition includes a first relatively lower melting temperature nylon, and typically a second relatively higher melting temperature nylon. Where the base polymer is EVOH, the modifying semi-crystalline nylon composition can optionally be defined completely by the relatively lower melting temperature nylon, which has a melting temperature less than 170 degrees C. Blends of disclosed amounts of amorphous nylon or EVOH with the semi-crystalline nylon component can be used to produce films which can be uniaxially oriented or biaxially oriented to provide shrink capacities of at least 28 percent, and up to about 57 percent or more.