The ultra-filtration Envirocare Riccar vacuum bags are 6 times higher than standard or micro-filtration bags to keep dust inside the bag, rather than release of dust into the air we breathe. Ultra-Filtration bags have an anti-bacterial that captures microscopic particles, germs, bacteria, pollens, spores, dust mites and allergens, small as 0.1 microns. The person who sold you the void probably made more promises on sustainability, efficient cleaning and filtration