N95 VS KN95 Face Mask: How to Choose? | GearBest Blog
ffp3 vs ffp2 vs n95 vs kn95 vs kf94 vs kn90 mask In fact, the letters in front of each mask type represent different national standards. The “N” series of the mask is the American NIOSH standard, the “KN” series is the Chinese standard, the “FFP” series is the European standard, and the “KF” series is the Korean standard.