[Premium Microfiber] --- The mop pad is made of high-quality microfiber, which has good water absorption ability and can removes dirt easily without damaging the floor. Material - This filter is made of PC, it is sturdy enough to use many times,To keep robot running at best performance, the parts are recommended to be replaced every 2-3 months. Easy To Replace and Clean - It is easy to be replaced and installed on your robot vacuums, Snap into place for quick and effortless routine replacement without tools, Easy to clean dirt and debris on the filter with our brush cleaning tool. Replacement Filter: A dirty filter greatly reduce suction power. Depending on the vacuuming frequency and amount of dirt cleaned, for best performance, change the filter at least every 3 to 6 months. HEPA filter is made of high-strength environmental-friendly materials, which can block most of dust down to 0.3 micrometer. The filter can maintain the cleaning performance of the sweeper, while reducing the