Allergen performance bags traps up to 100% of dust, petdander, mold & pollen Made of 3 ply synthetic filter media minimizes suction loss over life of bag Fits all models using U U-3 or U-6 bags 3 per package Availability: Usually ships the same business day Panasonic Allergen upright bags U and U-3, U-6 ENVallerpana3pk$9.95