WebFeb 2, 2024 · KF94 masks are the South Korean equivalent of the N95. The “KF” stands for “Korean filter,” and the “94” means that according to South Korean government standards, it is 94% effective at filtering out airborne particles. “Comparing it to an N95 which has 95% filtration efficiency, this is 94% good at filtering out particles. WebJan 15, 2024 · Masks produced after July 1, 2024, bear the standard number GB2626-2024; masks produced before that date have the standard number GB2626-2006.
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