In the wake of the COVID-19 pandemic, the U.S. Centers
for Disease Control and Prevention recommends that people wear
masks in public. Because N95 and surgical masks are scarce and
should be reserved for health care workers, many people are making
their own coverings. Now, researchers report in ACS Nano that a
combination of cotton with natural silk or chiffon can effectively
filter out aerosol particles—if the fit is good.
The best material for homemade face masks may be a
combination of two fabrics
