The HEPA filter for our Cyclone 3600 vacuum utilizes a high-efficiency particulate air (HEPA) media to filter out small particles such as dust, soot, mites, pollen, pet dander, and more. Its pleated design allows it to capture more particles per square inch. The filter is reusable, simple wash the filter with soap and water after every use. There is no need to replace it regularly, which adds to your cost and material waste.