Moose Racing Triple Layer Dry Air Filter 3-20-14TRIUnique triple stage foam filter designed for the most extreme conditions Eliminate the need for power robbing dust covers and outerwear covers Increase protection against silt, water and sand Allows for extended filter service intervals Can be cleaned, reoiled, and reused like a two stage filter Available in standard and pre oiled Used by factory off road teams around the world Made in the U. S. A.