IcePure AF002 3PACK Compatible with Whirlpool W10311524 AIR1 Refrigerator Air Filter [HIGH-EFFICIENCY FILTRATION]Filter in three layersA-Non-woven Cloth:remove big impurities.B-Activated Carbon Fiber:good absorption ability to odor, smoke, VOC, etc. C-Activated Carbon Sponge: high dirty holding ability. [Efficient And Durable]Some filter used a pleated activated carbon paper.We tested the total BAR of the original filter is below 33-35%;Icepure AF001 Air Filter : the BAR of A layer is 25-28%; the BAR of B layer is 44%. So the total BAR is over 50% at least. Over 30% higher effects than the other filter.BAR=Benzene Adsorption Rate. A index to measure the products absorption ability to the harmful substances in the air. [Effectively reduce odor]IcePure AF002 Air filter Ensures The Highest Standard Of Contaminant Reduction, Especially The Odors In Your Refrigerator, That's Why Our Filters Add Freshness To Your Refrigerator. [100% GUARANTEE]We are sure youll enjoy the benefits of our product. We offer 90-day money back guarantee and a friendly customer service.Please Note That This is A Compatible Spare Part, The Manufacturer's Names, Part Numbers Have Been Used For Compatibility Information ONLY. [COMPATIBLE MODEL]Compatible with Whilrpool W10311524 AIR1,Whilrpool 2319303,Whilrpool W10335147,Whilrpool W10315189,Whilrpool WD-W10311524