The high oxygen permeability film, so-called breathable film, can be produced via reactive blending and processing of linear-low density polyethylene, natural rubber, and epoxidized natural rubber with a small content of maleic anhydride as a reactive coagent. The foam-like structure of the produced breathable film was created by the reaction between the functional groups during the extrusion. Oxygen permeability of the blended films can be controlled by the blend composition, screw speed, and draw ratio during the chill-roll casting step. The blended films exhibit not only the good breathablility but also the outstanding UV screening with a small transparency trade-off. These properties are suitable for the films to be used in agricultural applications to enhance the growing and production of fruit trees, flowers, vegetables, and even grains, especially during the growing stage of plants.