Filtrete Micro Allergen vacuum bags capture 90% of particles larger than 1 micron in size, including dust mite debris, grass, and ragweed pollen. Fits Hoover canisters using S bags, including Commercial shoulder vac portable, Futura, PowerMAX, Spectrum, TurboPower 2000, 5000, 6000, 7000, and WindTunnel canisters. 3 bags per package.