AirSpace® Technology for highest suction power ... These dust filter bags have an extra filter chamber that pre-filters insucked dirt and dust and ensures better dust distribution in the bag. This preserves the highest suction power of your vacuum cleaner up to the full bag and does not fall off as with conventional dust bags. Swirl® dust filter bag with AirSpace Technology - Long Power - ren highest suction power and filtration up to the full bag. Thanks to an extra filter chamber, the sucked-in dirt is pre-filtered and thus ensures a better dust distribution in the bag. A significantly improved cleaning performance is achieved by the anti-allergen HEPA filtration. Swirl AirSpace Dust filter bag - for a clean and fresh cleaning result - easy to feel good Main features Functions Compatible products Siemens Packaging contents Number of dust bags 4