Has your Numatic lost it& 39;s suction? Maintain your vacuum& 39;s performance with the Filter-Flo dust bags designed for optimal cleanliness and convenience.The Filter-Flo 5 layer filtration dust bags have up to 50% longer usage life since the dust is absorbed into the fibres without blocking the pores, thus avoiding reduction in suction power. The Filter-Flo dust bags filters the air 40% more efficiently than a normal paper bag and helps you get rid of airborne particles such as, for example allergens and some bacteria. Ideal for the people with allergies.Suitable for Henry Hoover Models. Type: NVM-1CH Pack of 10 Plastic Collar 10 x Numatic NVQ370T Microfibre Vacuum Cleaner Dust Bags