PUR exclusive enhanced HVAC filters up to 99.7% of dust, pollen and contaminants, PUR exclusive weaves are USA-engineered to last up to 15,000 miles, 25% longer than standard performance of 12,000 miles, PUR filter use thick, industrial strength electrostatic media to trap even the tiniest of particles while densely packed activated carbon prevents gases and odours from entering the cabin, Road debris, exhaust fumes, and contaminants undergo filtration through a three-layer system, which includes a dust filter for trapping road debris, a particle-averting filter to block airborne particles, and an adsorption filter for absorbing exhaus, Contains soda combined with carbon cleans the outside air flowing through the ventilation system, Part Reference Numbers : 97458C XC11910C CF1399 TC11808C C11808C WP10606, Kit Includes: 6x Cabin Air Filter, Kit Variations: K54-100830 K54-100989 K54-101148 K54-101307 K54-101466 K54-101625 K54-101644 K54-101682 K54-101720 K54-101758, Part Reference Numbers : 97458C XC11910C CF1399 TC11808C C11808C WP10606