The filter is made of high-efficiency filter material, which can effectively filter dust, etc., to prevent large dust particles from entering the motor, to ensure a long service life of the vacuum cleaner. Wash with warm water and allow to air dry completely before reuse. A mild detergent can be used if desired. To ensure your vacuum cleaner operates properly and optimally, it is recommended to replace the filter every 4 to 6 months. Premium vacuum cleaner filters adopt a two-in-one design with high efficiency to block fine particles, floating dust, etc. Filters should be replaced every 4 to 6 months. If you have pets, please shorten the changing time to improve dust collection efficiency. Replacement number: 971517-01. Suitable for Dyson V12 Detect Slim. Package contents: 3 filters, 1 cleaning brush