Odor Remover: suitable for the smartmi air purifier P1, our filter B08Y1F6YC7 is designed to absorb various odors from the atmosphere, suitable for people who have pets, or who want to get rid of cooking odors, smoke or smog. Preliminary Filter For Large Particles: the air cleaner comes with different filtrations, including a fine preliminary filter that captures the most common large particles like hair, fiber, pet dander, lint, and more. H13 True HEPA Filter: coming with a second filtration called HEPA air filter, the smartmi air purifier P1 will effectively trap 99.97% of small airborne particles, including pollen, dust and PM2.5. Carbon Filter and Inner Filter: the third filtration is an activated carbon filter that works as an odor and smoke trap, as it can absorb pet and cooking odor, smoke, smog, and any other unpleasant household smells. The inner filter works as a backup for better supporting the filtration. Easy Filter Replacement: removing your old filter for air purifier and replacing it with the new one is quite easy.