The Lasko® YY25610 Replacement Filter Pack is designed to fit and work with the Lasko HF25610 Pure Silver Air Purifier. The filter pack contains 1 pleated HEPA type filter, 3 carbon filters, and 4 hook and loop straps. The pleated HEPA type filter will last up to 12 months and the Carbon filters last up to 4 months for a 1-year filter supply. The carbon filter removes smoke and cooking and other household odors. Plus, it captures pet hair, dust and other large particles. The pleated filter removes airborne irritants down to 0.3 microns, including pollen, dust mites, and pet dander.