Bagless vacuum cleaners are vacuum cleaners that contain dirt & debris in a container rather than a bag. Bagless vacuum cleaners offer convenience and usually the ability to see the dirt and debris trapped by the vacuum cleaner. The Miele CX1 series consists of three top rated bagless vacuum cleaners that we recommend highly. The difference between each Miele CX1 series vacuum cleaner is the way the vacuum cleaner comes accessorized. In general, the more expensive Miele models will have more accessories and better filtration.