Has your Numatic lost it's suction? Maintain your vacuum'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.