KF-AD is Anti-Droplet, which means to prevent fine water droplets.
It is a certified mask approved by the KOREA Ministry of Food and Drug Safety that has been tested for bacterial efficiency.
This is a summer mask made for the purpose of preventing droplets in daily life while filtering from 55% to 80% of KF standard particle blocking.
It helps prevent droplet infections more effectively than normal dental masks, and the filter is not too thick, making it easier to breathe and more comfortable to use.