(Disclosure: I am not a health professional.  This post is intended to refer the reader to a site offered by the Centers for Disease Control.)

I won’t say too much, but below is a link to a page on the Centers for Disease Control (CDC) website, describing how to make and use cloth masks properly.  Please read the instructions carefully, and consider clicking for other pages on the site.

The advice might change slightly in time, so it’s a good idea to go back and look at the site again later.

Please make the effort to avoid becoming infected.  Also, remember that we have been warned that some — perhaps many — people with active infections are asymptomatic, and capable of unknowingly infecting others.  Until further notice, we must all use extreme caution in our behavior with others, following the CDC’s guidelines and local directives.

https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-sick/diy-cloth-face-coverings.html