The K&N Filters Performance Air Filter filters the air entering your motorcycle's engine, capturing dirt and airborne contaminants before they reach the intake. You get a reusable element made from pleated, multilayer cotton gauze treated with K&N filter oil, combining a large filtration area with an oil coating that holds particles within the media.The following features explain how you maintain intake airflow, capture contaminants and service the filter:Multilayer Woven Cotton Gauze: Several layers of woven cotton form the filtration media, allowing intake air to pass through an extensive network of fibres that work with the filter oil to retain airborne dirt, helping you protect your engine from particles drawn into the airbox during everyday riding.K&N Filter Oil Treatment: Specially formulated oil remains suspended within the cotton fibres and acts as a tacking agent to hold contaminants passing through the element, making the oil an active part of the filtration process and helpi