PUR exclusive enhanced HVAC filters up to 99.7% of dust, pollen and contaminants, PUR exclusive activated carbon 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 : 97171 XC11815C CF11855 TC31769C C31769C WP10110, Kit Includes: 6x Cabin Air Filter, Kit Variations: K54-100841 K54-101000 K54-101159 K54-101318 K54-101477 K54-101636 K54-101641 K54-101679 K54-101717 K54-101755, Part Reference Numbers : 97171 XC11815C CF11855 TC31769C C31769C WP10110