The 2-Step Test to Check If Your Mask Is Effective

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Which face masks are really protective? Senior investigative producer Leslie Marcus shares the water and the candle test that can help you determine if your face mask is actually protecting you and others. She takes a number of masks through these tests, which can help you determine if you add a polypropylene filter. As a quick hack, Leslie shares you can also use a non-scented panty liner to add another layer of protection.

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