In all vacuum cleaners, the dust that is ultimately sucked in must be removed. Through this filter bags this is easy and hygienic. The user arrives by removing the filter bag, unlike bagless vacuum cleaners, not the dust absorbed on contact. Together with the filter element, the engine is protected and the exhaust air is filtered. Concentrations of particulate matter that can beeinträchtingen negative airways are reduced to a minimum. The filter bags are exactly coordinated with the Nilfisk-ALTO filter element.