Yes, federal law requires every person to wear a face covering that covers the nose and mouth at all times while traveling. Face coverings must be made of a solid material, fully cover the mouth and nose, fit snugly against the face, and be secured under the chin. Prohibited coverings include those with exhalation valves, holes (such as lace or mesh), neck gaiters, and bandanas. Face shields may be worn in addition to a face covering, but not as an alternative.
Learn more about the CDC’s face covering recommendations here.