These bags are designed to work with the ZVac Backpack Vacuum Cleaner Commercial Grade ZBV-2 1.5 Gal. They are HEPA graded bags with micro filtration. These are premium level bags to capture allergens, dirt, dust, and other debris. These vacuum cleaner bags will ensure you keep a safe and clean environment for allergy sufferers. Included: 6 Pack HEPA Bags for ZBV-2