What’s the Difference Between N95 and KF94 Masks? – Smart Air
KF94 is the “Korea filter” standard similar to the US N95 mask rating. Difference Between N95 and KF94 Masks: Charted Out. They look similar, and they filter a nearly identical percentage of particles—95% versus 94%. This chart from 3M explains the differences between the N95 and “first class” Korean masks.