VIDEO-Is a double mask really better than a single?

The News with Shepard Smith

CNBC's Contessa Brewer reports on the efficacy of doubling or even tripling the masks you're wearing during the pandemic.

02:20

Mon, Jan 25 2021 8:01 PM EST

https://www.cnbc.com/video/2021/01/25/is-a-double-mask-really-better-than-a-single.html