The new Miele FJM AirClean vacuum bags are an improvement over the earlier design. Over 80 years of experience have allowed Miele engineers to design a truly improved vacuum bag. The new design employs nine levels of filtration, improved air flow, high strength netting, and up to 30% improved performance and design over its predecessor. A new self sealing collar locks dust and contents inside of the dust bag so they do not escape into your home when replacing bags. Each box of AirClean vacuum bags contains the following: *4 - pack of FJM AirClean Vacuum Bags *1 - Motor Filter *1 - Super Air Clean Filter Miele FJM AirClean vacuum bags are used with the following Miele vacuums: S4000-S4999, S700-S758S, S500-S578, S300i-S399, S290-S291, S241-S256i.