K&N washable cabin air filters are engineered to fit directly into your factory air box, offering excellent protection from environmental contaminants and odor-causing particles. The thermally bonded high-flow synthetic material acts as a physical barrier, helping trap dust, pollen, mold, bacteria, fungi, and other pollutants, and is specially pleated to increase the contaminant-capturing surface area. Each filter is engineered to install easily into your factory cabin air box, and is designed to be easily washed and reinstalled whenever necessary. Buy with confidence under the K&N 10-Year/Million Mile Limited Warranty.