Allergen Bags Deliver A High Level Of Filtration For Common Allergens To Effectively Trap 99 Percent Of Dust And Pollens Down To 5 Microns. Easy-To-Install Design Goes On And Removes Quickly For Time-Saving Replacement. Disposable Material Allows You To Conveniently Discard Filled Bags For Time-Saving Replacement. Allergen Bags Are Designed For Hoover Insight Upright Vacuum Cleaners (Sold Separately).