Medical Face Masks

Check ASTM 2100 Standard Level? Lower level mask provide better breathability, while higher level masks provide superior protection. 1) Level 1: PFE >= 95%, BFE >= 95%, mmHg = 160 2) Level 2: PFE >= 98%, BFE >= 98%, mmHg = 120 3) Level 3: PFE >= 98%, BFE >= 98%, mmHg = 80

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