[Premium Microfiber] --- The mop pad is made of high-quality microfiber, which has good water absorption capacity and can easily remove dirt without damaging the floor. Material - filter is made of PC, it is durable enough to be used multiple times. To keep the robot working optimally, it is recommended to replace the parts every 2-3 months. Easy to Replace and Clean - It is easy to replace and install on your robot vacuums, snaps into place for routine and effortless replacement without tools, easy to clean dirt and debris on the filter with brush cleaning tool. Replacement Filter: A dirty filter will significantly reduce suction power. Depending on the frequency of vacuuming and the amount of dirt cleaned, for best performance, change the filter at least every 3 to 6 months. The HEPA filter is made of high-strength environmentally friendly materials, which can block most dust down to 0.3 microns. The filter can maintain the cleaning performance of the sweeper, while reducing the