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 : 90199P XC25853 CF10731 CF1125 AFC1582 PC5853 C25853 24200, Kit Includes: 4x Cabin Air Filter, Kit Variations: K54-100136 K54-100277 K54-100451 K54-100647 K54-100724 K54-100883 K54-101042 K54-101201 K54-101360 K54-101519, Part Reference Numbers : 90199P XC25853 CF10731 CF1125 AFC1582 PC5853 C25853 24200