This is a set of 100 non-woven fabric protective covers for vacuum cleaner filters. *This product includes the covers only; the filter itself is not included. It prevents the entry of fine dust and particles, extending the life of the filter. The non-woven fabric is breathable, catching only the dirt without reducing suction power. It is elastic and compatible with various filter shapes. Disposable and hygienic, easy to replace. *We will respond promptly. We can ship it by the next day at the latest, so please rest assured.