H13 True hepa technology: filters 99. 97% dust, pollen, smoke, odors, mold spores, and pet dander. The air filters catch particles as small as 0. 3 microns 3-Stage Filtration System: H13 True Hepa, fine preliminary filter, and high quality activated carbon filters reduce unwanted odors in your living spaces. Perfect for anyone wanting to improve air quality Properly sealed: filters are sealed to protect their lifetime. It is recommended to replace air filters every 6 months. Remove filters from plastic packaging before placing them into air purifier Buy with confidence: 100% satisfaction . If you need additional assistance, contact the helpful LEVOIT support