Advance filtration bags feature a hypoallergenic filtering system to reduce the amount of allergens being dispersed into the air. Easy-to-install design allows fast, simple replacement to minimize your time spent on maintenance. Disposable material allows you to conveniently discard filled bags for fast, easy replacement. Filtration bags are designed for use with compatible Oreck XL uprights without a bag dock (sold separately).Advance filtration bags feature a hypoallergenic filtering system to reduce the amount of allergens being dispersed into the air. Easy-to-install design allows fast, simple replacement to minimize your time spent on maintenance. Disposable material allows you to conveniently discard filled bags for fast, easy replacement. Filtration bags are designed for use with compatible Oreck XL uprights without a bag dock (sold separately).