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 : R527993 527993 XC10434 CF11854 CF1337 CF1393 PC99052 C29064 WP10179 WP2100, Kit Includes: 10x Cabin Air Filter, Kit Variations: K54-100086 K54-100227 K54-100301 K54-100422 K54-100671 K54-100953 K54-101112 K54-101271 K54-101430 K54-101589, Part Reference Numbers : R527993 527993 XC10434 CF11854 CF1337 CF1393 PC99052 C29064 WP10179 WP2100