Miele FilterBags and Miele genuine exhaust filters form the advanced 12-stage Miele AirClean System. The different FilterBag types ensure a perfect match between FilterBags and vacuum cleaners - a holistic approach only Miele can offer. Each box of genuine Miele FilterBags contains an AirClean Filter and a pre-motor filter and is therefore a peace-of-mind package ensuring best performance of a Miele vacuum cleaner. All Miele FilterBags feature the color-coded system to differentiate clearly between the various FilterBag types. This makes it easier for consumers to identify the right bag type.