aFe POWER Air Filter Cleaner is a proprietary formula made exclusively for aFe POWER's synthetic air filters. This air filter cleaner is designed to break down dirt and dust without harming the filter media. aFe POWER's synthetic air filters are washable and reusable, so proper maintenance is key to a long service life. After the filter has been cleaned, just let it dry and it will be ready to be re-installed in your vehicle.