On Tuesday, New York City Mayor Bill de Blasio encouraged New Yorkers to wear two masks at least until June.

De Blasio urged citizens in the Big Apple to add a second mask to their personal protective equipment arsenal in a morning press conference. “Through June, keep doing exactly what you are doing,” he said. “Not just wear a mask, wear two.” De Blasio further obscured the timeline for the practice, admitting the local government may “continue that guidance for quite a while depending on what is going on.”