ACDelco CF139 GM Original Equipment Cabin Air Filter Equipped with long media in the non-woven material/compound media in order to capture more particles while increasing air flow Has compound media that consists of three layers in which the outside layer captures 100% of large airborne particles, the middle layer captures smaller particles, and the final layer provides strength and stability Has a layered construction that creates separated media in order to better contain dust and pollen particles, resulting in higher efficiency GM-recommended replacement part for your GM vehicles original factory component Offering the quality, reliability, and durability of GM OE