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 : 97049 XC11709 CF12307 SEE CF1285 TC31499 C31499 WP10448, Kit Includes: 4x Cabin Air Filter, Kit Variations: K54-100567 K54-100825 K54-100984 K54-101143 K54-101302 K54-101461 K54-101620 K54-101668 K54-101706 K54-101744, Part Reference Numbers : 97049 XC11709 CF12307 SEE CF1285 TC31499 C31499 WP10448