The Swirl MicroPor Plus filtration ensures maximum perceivable cleanliness. This process not only retains normal household dust but also allergenic fine dust in the form of pollen, mold spores, mite droppings, and bacteria in the bag. TÜV Nord, an independent testing laboratory, examined and confirmed these properties with a certificate. For allergy sufferers and asthmatics, this means easier breathing and relaxed deep breaths. The Swirl AirSpace Technology with an extra filter chamber provides maximum suction power. The dirt and dust that are sucked in are pre-filtered, and the particles are evenly distributed throughout the bag. The result: full suction power is maintained until the bag is actually full, and the bag does not fall off, as is the case with conventional vacuum cleaner bags. What good is the highest quality in vacuum cleaners and dust filter bags if the dust closure proves to be a weak point? Especially when changing the dust filter bag, fine dust can escape into the environment and thus pose a risk to human health. The Dirtlock dust closure delivers on its promise, as its thoughtful closure mechanism ensures that the dust stays where it belongs when disposing of the full dust filter bag. Simply convenient and safely clean.