■ Extend the life of your Xiaomi Robot Vacuum Mop Essential with the Xiaomi Mi Robot Vacuum Mop Essential Filter. This accessory can be used to replace worn out or damaged dust filters on your Xiaomi MI Robot Vacuum Mop Essential. The filter features a HEPA design and is used to allow air to pass through the dust bin that’s inside the vacuum but is able to trap up to 99% of tiny particles like dust and pollen. Its design allows for easy cleaning for longer use before replacement and is easy to install. • Original dust filter for Xiaomi MI Robot / Roborock Sweep One vacuum cleaners. There are two pieces of filter in the package, including the plastic holder of the filter to the collecting basket. • The dust filter of class E11 captures dust particles from a size of 0.3 nanometer with an extremely high efficiency of 99.2% or higher, thus avoiding secondary pollution. • It is recommended by manufacturer to replace these filters every 3-6 months, or more often, depending on the intensity of the robot's usage. You can find the filter wear status in MI Home app settings. • Filters are washable under running water due to different material and membrane.