Dust mask(KF94)

KF (Korea Filter) means the blocking rate of fine particles (average particle size of 0.6 μm) and is a mask standard for prevention prepared by the Korea Food and Drug Administration.

KF80 can filter more than 80 percent of fine particles with an average size of 0.6 μm.

'KF94' and 'KF99' are mask performance standards that can pass only when particles with an average size of 0.4μm can be filtered out at least 94% and 99% respectively.