As the first line of indoor air quality defense, the air filter is indispensable. Whether it is a 99 cent disposable or very expensive and pleated, PuraClean® Filter Spray will turn it into an ultra-efficient electrostatic version of itself. Ozone safe PuraClean is quick and easy to spray-on without causing your filter to restrict air flow. Filters treated with PuraClean® do a much better job of removing dust, debris, dander, mold spores and other airborne contaminants from the air in your home with an increase in filtration efficiency by up to 200%