The AirHog[TM], at FRAM[R], a division of Honeywell Consumer productions Group, is a washable, reusable air filter designed to increase horsepower. Unlike disposable filters, the AirHog is designed to last the life of the vehicle. It comprises a quadruple layer of cotton gauze detained according to a screen-back mesh and is designed to allow for more airflow, according to the company. (800) 890-2075