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These high-quality masks are only a buck apiece right now. (Photo: Amazon)

Masks are as important as ever to prevent the spread of the coronavirus, thanks to the rise of the Delta variant. And, while you might have tossed your old masks, the Centers for Disease Control and Prevention now recommends that all Americans — regardless of vaccination status — mask up indoors where there is substantial risk or high spread of COVID-19.

Still, it’s tough to know which masks are the most effective.

We’re not talking about the cute fabric masks emblazoned with the name of your favorite band. We’re talking about KN95 masks — the ones the CDC specifically recommends you wear…