Face masks ‘more guaranteed’ to work against coronavirus than vaccine, CDC director warns Shelton says there’s actually a couple tricks, depending on the style of mask you’re wearing.Some masks have a thin layer of metal on the top that can be pinched, creating a tighter seal around the nose.
Shelton says to definitely take advantage of that feature if you can.“You just want to make sure you pinch it as tight as you can,” she said.“But if that’s not enough you can also do a sort of weather-stripping trick.” U.S.