3-Stage Filtration: The Pre-filter can filter pet fur, hair, scurf, the H13 True HEPA Filter can reduce out 99.97% of dust, PM2.5, dirt in the air, the active carbon filter can remove odors. Provide a comfortable and safe environment for your children and family. FILTERS: MA-15 Filters are made of filtration systems including Pre-Filter, True HEPA Filter and Activated Carbon Filter.Fine Pre-Filter remove large particles such as hair, pet fur, dander and lint. True HEPA filter remove particles like household dust, and pollen, etc. Activated carbon filter helps to strongly remove unwanted odors, smoke, VOCs and more. Easy to install and clean: Easy to install, no tools required. True HEPA filter is essential for households with Children, Seniors, Pets, Allergy, smokers and Asthma sufferers. Compatibility: Very suitable for Air MA-15 air purifier, including H13 HEPA replacement filter and activated carbon pre-filter.(Please Check Model Before Purchase) Replacement Cycle: The use of a new filter can improve the efficiency of your air purifier, thereby ensuring fresh and safe air in the room. It is recommended to replace the filter every 6 months.