K&N Air Filter Ya-0116 K&N Air Filters are designed to achieve nearly unrestricted air flow without compromising the filtration level. The high flow cotton gauze air filter is washable, reusable and built to last the life of your ride. K&N air filters consist of four to six sheets of cotton gauze layered between two sheets of aluminum wire mesh. This is pleated and oiled, enhancing its filtering capabilities and overall performance. Features: Washable and reusable High flow cotton gauze and aluminum wire mesh