A number of news reports have mentioned double masking as one of the preventive measures that can be taken to guard against COVID-19. The link below is one source of information on how to "double mask". https://www.huffpost.com/entry/why-double-mask-prevent-covid_l_600f3e87c5b600a27962329e?utm_campaign=share_email&ncid=other_email_o63gt2jcad4