Bosch Workshop Cabin Air Filters feature a multi-layer media that offers a 99 percent efficiency rate at 3 microns or greater in keeping dirt and other particles from entering vehicle heating and air vents 1st Layer - Non-woven pre-filter layer captures larger particles 2nd Layer - Electrostatically charged microfiber layer attracts and holds elusive smaller particles 3rd Layer - Non-woven cover layers add stability to protect the microfiber layer from damage and acts as an additional barrier to harmful elements High pleat count provides greater surface area for higher filtration capacity; Foam perimeter gasket or rigid frame included where specified by OE Compatible with select vehicles (Note: vehicle trim level may affect fitment - verify specific vehicle fitment details with fit checker above): FORD: 2005-12 Mustang