Dr. Anthony Fauci said that wearing two face masks “likely” provides more protection than wearing just one mask.

“Because, I mean, this is a physical covering to prevent droplets and virus to get in,” Fauci told NBC’s Savannah Guthrie on Monday. “So, if you have a physical covering with one layer, you put another layer on — it just makes common sense that it likely would be more effective, and that’s the reason why you see people either double-masking or doing a version of an N95.”