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 : 90259P XC46126 CF11667 CF1229 AFC1504 PC4014 C46126 24014, Kit Includes: 4x Cabin Air Filter, Kit Variations: K54-100082 K54-100223 K54-100491 K54-100615 K54-100772 K54-100931 K54-101090 K54-101249 K54-101408 K54-101567, Part Reference Numbers : 90259P XC46126 CF11667 CF1229 AFC1504 PC4014 C46126 24014