Masks may help, but only if they are a type called N-95, which has to be carefully fitted.

Fitted carefully, they make a very nice and durable surface.

She fitted the mask carefully, studying herself in the mirror.

The wall was made of carefully fitted stone and was about five feet high.

Each had its own pocket, carefully fitted and lined in green velvet.

I had them carefully fitted, and was pleased with them.

But skintight suits have to be carefully fitted, and that takes time.

Pessaries come in a variety of sizes and should be fitted carefully.

Its buttress is built of large, regular, carefully fitted blocks.

The man standing before the bedroom mirror carefully fitted his cuff-links together.