PurolatorBOSS® Premium Cabin Air Filters with Febreze Freshness blocks and controls odors, filters virus aerosols, and prevents mold and bacteria growth on the filter. Unscented, so only fresh, clean air flows through your vehicle. Our highly efficient particulate layer filter blocks over 99% of fine particles like road dirt, brake dust, soot, pollen and other allergens from entering the vehicle's cabin – all while optimizing air flow through the HVAC system.