Simple and safe disposal of dust from dust classes L and M. High-quality fleece filter bag that autonomously cleans dust deposits inside the filter bag. When the suction unit is turned on, the self-cleaning filter bag inflates. When the suction unit is turned off, the bag collapses, releasing dust deposits inside the self-cleaning filter bag. For longer cleanliness and thus a longer-lasting high suction power. For efficient, clean, and health-conscious work with a system.