Rain X Glass Treatment seals the microscopic pores of glass with a super slick, non stick invisible barrier that repels rain, sleet, and snow on contact. Rain-X also makes for easy removal of frost, ice, salt, mud, and bugs. Rain X Anti-Fog ends fogging, misting, and steaming of interior glass, plastic, and mirrors. Bonus pack includes one 7 oz. Rain-X Glass Treatment and one 3.5 oz. Rain-X Anti-Fog.