As a 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 300%. For the same cost as one high-end electrostatic filter, PuraClean® filter spray will treat a year"s worth of disposable filters and make your disposables just as effective as an electrostatic filter! PuraClean® is applied by simply spraying a thorough coating over the entire surface of an air filter before it is installed and then waiting ten seconds for it to dry. Contains one 16 ounce bottle. Visit www.qwik.com for video tutorials, independent lab test results, and additional product information.