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 : 90207P XC35660 CF10728 CF1200 AFC1367 AFC1447 PC5660 C35660 49377 WP10083, Kit Includes: 4x Cabin Air Filter, Kit Variations: K54-100053 K54-100194 K54-100407 K54-100607 K54-100746 K54-100905 K54-101064 K54-101223 K54-101382 K54-101541, Part Reference Numbers : 90207P XC35660 CF10728 CF1200 AFC1367 AFC1447 PC5660 C35660 49377 WP10083