The Swirl MicroPor Plus filtration system ensures maximum perceivable cleanliness. This method not only retains regular household dust but also traps allergenic fine dust in the form of pollen, mold spores, dust mite droppings, and bacteria in the bag. TÜV Nord, an independent testing laboratory, has verified and confirmed these properties with a certificate. For allergy sufferers and asthmatics, this means easier breathing and relaxed deep breaths. The Swirl AirSpace Technology, featuring an extra filter chamber, provides the highest suction power. Inhaled dirt and dust 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 well-thought-out closure mechanism ensures that dust stays where it belongs when disposing of the full dust filter bag. Simply convenient and safely clean.