HEPA Filter: The HEPA filter is made of high-strength environmentally friendly materials that can block most dust down to 0.3 microns. The filter can maintain the sweeper's cleaning performance while reducing the entry of dust, pollen, and other allergens into the air you breathe. Easy to assemble: The filter is located inside the dust container. Remove the dust container by grasping it firmly and pulling it outward. To empty the dust container, locate the release latch and pull it open and empty it. Remove the old filter, then place the new filter in the dust bin. Replacement filter: A dirty filter will significantly reduce suction power. Depending on the frequency of vacuuming and the amount of dirt cleaned, for best performance, change the filter at least every 3 to 6 months. High-efficiency activated carbon filter absorbs household odors from pets, cooking, , forest fires and harmful substances Easy to replace and disposable, no tools required. Replace filters every 6 months for