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 : 97166 XC11831 CF12936 TC31547 C31547 WP10080, Kit Includes: 7x Cabin Air Filter, Kit Variations: K54-100553 K54-100832 K54-100991 K54-101150 K54-101468 K54-101627 K54-101657 K54-101695 K54-101733 K54-101771, Part Reference Numbers : 97166 XC11831 CF12936 CF1421 TC31547 C31547 WP10080