"You do get additional protection from double-masking, but fit is really, really important," said Gary Bennett, PhD, professor of psychology and neuroscience, global health and medicine at Duke, in response to a question from Nneka Ogwumike of the LA Sparks. He explained that the risk of infection via plane travel is higher than you'd get in daily interactions or other types of travel, but not overly dangerous, and that wearing two masks can give you more protection.