Multi-layer electrostatic cotton has real electrostatic adsorption capacity. It has good air permeability and efficient dust filtration capacity. Make your vacuum cleaner quieter and longer cleaning time. Filters can be washed and reused. In order to ensure the performance of the vacuum cleaner, it is recommended to replace the filter with a new one after cleaning 2-3 times. 2 packs of great value packages, you can replace the new filter at any time during your cleaning process to ensure uninterrupted cleaning.