OOLTAH PAHIYA Square & Oval Waterproof Anti-Fog Film (Set of 4 Pcs) Compatible For WAGON-R -2 Car Mirror Rain Blocker  (Blue)

Anti-fog car films are a thin-film laminate with an adhesive backing applied externally to several parts of a car made of glass or similar look alike, for instance, windows, windshields, rearview mirrors, and others. The anti-fog film is coated with a layer of special anti-fog agents that prevents the accumulation of fog on the glass surface. The film is usually made up of polyester, also chemically known as polyethylene terephthalate or PET Film. This technology of anti-fog was developed by NASA on transparent glass and plastic surfaces for optical applications on helmet visors during the Gemini 9A space program in 1966. With time, the application of anti-fog films grew widely across different industries as advancements in research for the development of advanced chemicals of anti-fog agents were being developed.