KF-AD means blocking fine water droplets with Anti Droplet, and unlike KF80, KF94, which are health masks, it is a medical product mask licensed by the Ministry of Food and Drug Safety that has proven bacterial efficiency test.
It is a summer mask designed to prevent non-mal infections in everyday life, filtering out particle blocking based on KF from 55% to 80%.
It prevents non-mal infections more effectively than normal dental masks, and the thickness of the filter is not large, making it easier to breathe and more comfortable to use.