Hoover Type Z Allergen Filtration Bags 4010101Z 3 bags per package. Fits all Hoover uprights using Type Z bags including, Power Drive, Dimension, Dirt Finder, Auto Drive, Turbo Power 3500, 3700,4500,500, 600,700, Power Max, Breath Easy, and Caddy Vac. Traps 100% of dust mites and their eggs. Traps 99.98% of ragweed and common Grass Pollens. Filters and wide range of airborne particles, including many pollens and cat dander, spores and other allergens. Electrostatically charged liner enhances the capture of extreemly fine particles Ideal for many with allergic or dust related discomforts.