If you only have a single-layer or loose-fitting mask, it may be smart to wear two at once. To double up, wear one cloth mask over another, or wear a cloth mask over a surgical mask. Experts have long ...

Fit is key. If a mask doesn’t fit well, it can allow droplets to leak in or out. Look for masks that have nose wires to allow for a tight fit over your nose. A snug fit on the face is also desired.