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No Sewing Cloth DIY Mask with Replaceable Filter (Tight Fit & Done In 5 Minutes)
Since this design seals the gaps that often result on the sides of ordinary cloth or surgical masks, it would be comparable to an N95 mask.
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How Effective Is Your DIY Face Mask? Easy Home Test
Is your face mask effective? How do you test the quality of your mask, especially your own DIY masks? Avoiding this question is unsafe and you cheat your own health.