BNX Cabin Air Filters are designed using 99.97% PFE HEPA meltblown filtration media, based on U.S Standard IEST-RP-CC001.7. The premium BNX cabin filters are proudly manufactured in the U.S. and protect you against harmful microscopic particles such as smoke, smog, mold, bacteria, pet dander and more. (Registration #101638-TX-1)