astm level 3 medical face mask, nelson lab face mask tested 3-ply disposable medical face mask PPE surgical masks with 99% meltblown filtration layer 50PCS/Box




ASTM level 3 medical face mask is a professional medical face mask. nelson lab face mask tested, During the period of COVID-19 transmission, the effective organization of the spread of the COVID-19 virus is very suitable for daily protection.

Performance Factor Results

Characteristics: Level 3

BFE: >=99%

Resistant: 120 mmHg

Differential Pressure: <= 5.0

Flame Spread: Class 1

These masks should be disposed of after each use. These masks contain an aluminum nose piece and should be stored in a cool, dry place. Avoid exessive heat( 40C or 104F)


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