Less mess. With a bag, there’s little to no chance that your dust will wind up back on the floor or in your face. Better for allergy sufferers. Bags keep dust and allergens completely separate from the person who is doing the vacuuming. As a result, disposing of dust is much less likely to cause an allergic reaction. Less maintenance is required. Vacuum cleaner bags take a lot of stress off your vacuum cleaner. The bags hold more dirt than their bagless counterparts, so you don’t need to dump the dirt as often.