I'm vacuuming with my vintage kirby sanitronic, it's been awhile since I've cleaned out the bag. You can see as I vacuum with it that it's nearly bursting. I finish cleaning and sit down to clean out the bag. It is STUFFED to the brim! Full of hair, dust, dirt, glass, all kinds of things that shouldn't be in there- warped coins in the trap tray... it's really intense! At the end I vacuum up the inch thick dust that fell out.