Isolate dust - This karcher vacuum cleaner bag will not only contain dust, glass, dust, pollen, gravel, leaves and common household liquids, but also fine allergic dust in the form of fungi, spores of mold, fecal mites and bacteria. For allergy sufferers, this means relief from allergenic fine dust in indoor air. PREMIUM MATERIAL - Unlike the original material, the vacuum cleaner bag Karcher WD4 is made of thicker non-woven material to ensure greater durability. It will not be pierced by the sharp scrap metal inside and it will not leak. These Karcher filter bags can be washed and reused. Cheap and . LARGE CAPACITY - The large capacity of the wd4 bag holds large amounts of litter, saving you from having to take the litter out as often and prevents the bag from clogging, thus promoting a long life. Affordable - We offer 10 Karcher vacuum bags. We recommend replacing the Karcher WD5 pack every 2-3 months. This preserves the filters used for Karcher's cleaning performance and reduces dust, pollen and other allergens entering the breathing air.