ASTM mask ratings explained in plain English

September 2, 2026Omnipre editorial teamInfection Prevention

Level 1, 2 and 3 masks differ in fluid resistance and filtration. Here is when to use each.

The standard

ASTM F2100 rates medical face masks on fluid resistance, filtration efficiency, breathability and flammability.

Level 1 suits low-risk care and visitors. Level 2 covers moderate fluid exposure. Level 3 is for procedures with a high risk of splash or spray.

Stock the level your procedures require — and make it easy for staff to tell them apart with clear labelling.

Omnipre editorial team

Procurement and clinical-supply specialists at Omnipre Connect, North Easton, MA.

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