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 : 97444C XC11951C TC41783C C41783C WP10488, Kit Includes: 12x Cabin Air Filter, Kit Variations: K54-100566 K54-100826 K54-100985 K54-101303 K54-101462 K54-101621 K54-101667 K54-101705 K54-101743 K54-101781, Part Reference Numbers : 97444C XC11951C TC41783C C41783C WP10488