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Please let me know what the material is that these are made of. I want to use for a mask to guard agains Covid-19. Don't want glass particles.

asked by Lisa Draper on April 28, 2024

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There is no fiberglass. You can use the microfiltration 99.7% bag paper as an insert between two layers of breathable cloth.

EZvacuum Support answered on April 4, 2020