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 : 527998 XC10590 CF12152 CF1355 TC38155 C38155 WP10195, Kit Includes: 5x Cabin Air Filter, Kit Variations: K54-100541 K54-100834 K54-100993 K54-101152 K54-101311 K54-101470 K54-101629 K54-101651 K54-101689 K54-101765, Part Reference Numbers : 527998 XC10590 CF12152 CF1355 TC38155 C38155 WP10195