How to Double Mask

The CDC has released a report showing that two masks are better than one for curbing transmission of the coronavirus. Here's the proper way to double up.

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The specific method tested by the CDC starts with a disposable medical mask underneath. Then add a cloth mask over the top. As with any mask you wear, the most important thing is making sure both masks have a proper fit. Both masks should be covering both your nose and mouth. Ideally, the inner medical mask will have a nose wire to make a proper seal against your nose, and the cloth mask will press the inner mask closer to your face and ensure a tighter fit.

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https://www.wired.com/story/how-to-double-mask/