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 : 90118P XC15659 CF11921 CF1109 AFC1390 PC5659 C15659 24826, Kit Includes: 4x Cabin Air Filter, Kit Variations: K54-100046 K54-100187 K54-100509 K54-100583 K54-100706 K54-100865 K54-101024 K54-101183 K54-101342 K54-101501, Part Reference Numbers : 90118P XC15659 CF11921 CF1109 AFC1390 PC5659 C15659 24826