Contaminants from daily driving are drawn into the cabin of the vehicle through the heating/air conditioning system and are then filtered through the Cabin Air Filter or, CAF. When clean, the CAF provides for efficient and prolonged operation of your vehicles heating/AC system as well as protecting passengers from noxious particulate debris drawn in from the outside road environment. Pollens, allergens, various fuel based contaminants all pass into and are filtered by your Cabin Air Filter. TYC CAF is designed to have the same or better filtration efficiency as the original equipment filter. Same level of dust load capacity ensures the same amount of dust collecting power, while same level of pressure drop ensures the same level of air flow throughout the vehicle's cabin. Each TYC CAF also comes with step-by-step installation instructions for ease of replacement.