Hoover A Micro filtration vacuum bags are designed to fit Upright vacuums using the Hoover A bag. Advantage Micro filtration bags are constructed of a strong paper outer layer and fine Micro-Liner that captures microscopic particles with an efficiency rating of 95%. Advantage Micro filtration bags are great for allergy sufferers. Designed to fit Concept One, Concept Two, Convertible (top fill), Elite, Encore, Futura, Soft and Light, Legacy, Preferred, PowerMax, Supremacy, Runabout, Spectrum, Sprirt, Sprint, Tempo, Decade 8000, Decade 80, RS, Constellation, Turbo Power, 1500, 2000, 2200, 3000, 3200, 4000, 4200, and Innovation. This package contains 10 premium Micro-Lined bags.