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MPPS (Most Penetrating Particle Size) 0.3 Micron

Harder to filter than 3.0 micron used in BFE testing, and also 0.1 micron size used in PFE.

Level of Protection:

FFP2/ N95 (Tested at 0.3 μm MPPS with at least 94%-95% efficiency) > Medical Mask (PFE tested at 0.1 μm) > Medical Mask (BFE tested at 3.0 μm)

BFE (Bacterial Filtration Efficiency)Measurement of a respirator material’s resistance to penetration of BACTERIA. -Test with 3.0 micron
PFE (Particulate Filtration Efficiency)Measurement of filtration efficiency of PARTICLES. (Including dust, pollution, and even viruses & bacteria). -Test with 0.1 micron

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