Type-A Allergen Bags Deliver A High Level Of Filtration For Common Allergens To Help Prevent Them From Being Dispersed Into The Air. 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 Conquest 14" And 18" Vacuum Cleaners (Sold Separately).