HEPA filter is made of high-strength environmental-friendly materials, which can block most of dust down to 0.3 micrometer. The filter can maintain the cleaning performance of the sweeper, while reducing the penetration of dust, pollen and other allergens into the air you breathe Easy to Assemble: This filter is inside the dirt tank. Remove the dirt bin by firmly grasping it and pulling it out, to empty the dirt bin, find the release latch and pull it to open and empty. Take out the old filter and then place the new filter back into the bin. Replacement Filter: A dirty filter greatly reduce suction power. Depending on the vacuuming frequency and amount of dirt cleaned, for best performance, change the filter at least every 3 to 6 months. Fine preliminary Filter traps larger particles in the air like dust, hairs, pet fur, lint and more High-efficiency activated carbon filter absorbs household odors from pets, cooking, smoking, wildfire, and harmful VOC's Compatible with model: For Bot