AEG has designed these high quality filters to fit your bagless vacuum cleaner T8: AT 3550, 3560, 3570 and maintain its best performance. The high grade of material, used for our genuine filters, provides your vacuum cleaner with high filtration level and maximum dust retention. Filters protect your vacuum cleaner motor from dust particles inside the dust container and retain the ultimate dust before leaving your vacuum cleaner. To ensure the performance of your cleaner, we recommend you to wash the Hygiene filter each time the dust container is emptied. Let the filter dry before replacing. Caution: the framed motor filter is not washable. For optimum performance all filters should be replaced at least twice a year or when they are visibly soiled. The use of non-genuine filters may adversely affect the performance of your bagless vacuum cleaner. This filter pack includes one washable Hygiene filter, one washable foam filter and one non washable motor filter. Filter pack reference: AEF 139.