Bosch BBZ52AFP1U Type P Dust Bags for the BSG Canister Vacuum Series (5 Bags Plus 1 filter)Bosch's three layer Type P MEGAfilt SuperTEX dust bag BBZ52AFP2U or BBZ52AFP1U is perhaps the most advanced on the market and has the ability to filter out even the finest dust particles while cleaning the surrounding air. Therefore, because the Bosch Premium Series utilizes the MEGAfilt SuperTEX, this results in cleaner carpets and allows dust allergy sufferers to breathe easy. The BBZ52AFP1U MEGAfilt SuperTEX for the Premium Series of canister