3-Stage Filtration System: Pre-filter, Personal HEPA Filter, and Activated Carbon Filter work together to reduce airborne particles and unwanted odors in your living space for better air quality HEPA Filtration: The Personal HEPA Filter treated with HEPAsmart Technology meets the High Efficiency Particulate Air Standard and captures at least 97% of airborne particles down to 0.3 microns in size. This includes fine dust, smoke particles, and allergens like pollen and pet dander Traps Household Odors: The activated carbon filter physically absorbs smoke, cooking odors, pet odors, and toxic fumes, making it ideal for pet owners, smokers, and people living in cities Buy with Confidence: Filters are sealed to protect their lifespan. Remove the plastic packaging before operating the air purifier. 3-in-1 HEPA Air Purifier Replacement Filter, High-Efficiency Activated Carbon, White Mini-RF Core，Applicable to Levoit.