[Premium-Grade Filtration Purity]：PHILTOP cabin air filters are comprised of five layers that provide up to 99.9% filtration, that effectively reduces small particles of 0.1-0.3 microns like dust, soot, pollen and other air impurities, keep it from entering the vehicle, providing you with a comfortable interior environment
[Improves HVAC System Performance]: The special structure of the long-fiber layer electrostatic cotton makes the dust-holding area times higher than other flat materials, with enough gaps for air passage to improve the heating and cooling efficiency of HVAC
[Suggestion for Replacement]：Replace every 12 months or when it drives to 12, 000 miles. If you often drive in heavily polluted areas and muddy roads, it is recommended that you replace them frequently to keep the air fresh in the car
