FilGuard is dedicated to manufacturing premium products that protect the most vital component of your motorcycle or ATV - the engine. Die-hard racers and weekend warriors put their trust in FilGuard. Premium two-layer bonded foam allows for maximum protection and airflow. Extra-thick foam base provides a superior seal to the airbox. Outer foam traps large particles and the fine inner foam traps the smallest dust particles. Designed for off-road and motocross use. For best results use with FilGuard Bio Air Filter Oil and FilGuard Bio Air Filter Cleaner. Made in the U.S.A.