High-quality non-woven filter bag cleans dust deposits inside the filter bag automatically. Switching on the mobile dust extractor puffs up the SELF-CLEAN filter bag. Switching off the mobile dust extractor collapses the bag, removing dust deposits inside the SELF-CLEAN filter bag. For longer cleanliness and consequently a more sustained high suction power. This enables work to be carried out efficiently, cleanly and systematically and reduces hazards to health.