I never did appreciate the concept of bagless vacuums. You may filter microscopic dust but then you have to shake it out in the garbage while that microscopic dust floats away in the wind and swirls around your trash bin and house. Isn't that what you were just trying to vacuum up? Then you have to wash those filters. CRAZY. These Z bags do all the work for you. Keeps all that microscopic dust CONTAINED. When full, remove from vacuum, cover the hole with some tape, and deposit in trash. And they are made of biodegradable paper at that. It may seem "old school" or from "back in the day" but it is a VERY VERY SMART WAY to vacuum and it is environmentally sound. Your choice.