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 : 90238P XC16079 CF10747 CF1216 AFC1510 PA50 C16079 49093, Kit Includes: 4x Cabin Air Filter, Kit Variations: K54-100078 K54-100219 K54-100508 K54-100657 K54-100695 K54-100854 K54-101013 K54-101172 K54-101331 K54-101490, Part Reference Numbers : 90238P XC16079 CF10747 CF1216 AFC1510 PA50 C16079 49093