Unique 2-part polyurethane foam material traps dirt and debris while letting air flow through
Full-depth filtering system — interlocking cells coated in oil trap and hold the dirt through the entire volume of the filter
Uses the latest concept in air filtration technology. Foam filter is made of far superior paper or gauze — it's 12 times thicker and continues to perform even as the filter gets dirty. And here's the best part....when the filter gets dirty, just wash and reuse! Will not void factory warranty. Lifetime warranty.