This is Kirby's NEW Micron Magic Bag with Charcoal Filtration. It is specifically designed to fight them nasty odor buildups in your vacuum bag!! This Universal Style Fits Both F-Style, and Twist-Style Kirby Models.  

• Micron magic vacuum bags with charcoal filtration
• Fits Kirby Style F and Twist style model vacuum cleaners 
• Premium filtration with odor control
• Traps dirt, dust, pollen and other allergens
• Activated charcoal layer helps neutralize unpleasant odors and it is ideal for households with pets
• OEM # K-202816