A proper 3-ply surgical mask, has three layers – each performing its own specific function:
- an outer blue polypropylene fabric with hydrophobic treatment layer, which repels water, blood and body fluids,
- a middle polypropylene filter layer that is designed to filter bacteria, ASTM F2101-19 Standard Test Method certified and rated >99% BFE (Bacterial Filtration Efficiency) and
- an inner white hydrophilic polypropylene fabric layer, which absorbs water, sweat and spit.
Shelf Life
36 months
Storage
Store in dry area.
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