- Each box contains 4 Miele AirClean DustBags, 1 Motor Protection Filter, and 1 AirClean Filter. Miele's revolutionary and patented DustBag is an important component of the vacuum cleaners filtration system. Our unique AirClean bag contains 9 layers of electrostatically charged material that traps micro-sized debris in the airtight vacuum chamber. It's spring-loaded, self-locking collar keeps microscopic dust and allergens safely trapped inside, so you never have to worry about releasing the lung-damaging particles back into the air, even during disposal. Use genuine Miele filters and Dustbags for optimum performance.