The Best Face Masks For 2021 - SeniorsMatter.com
Dec 16, 2020·In general, face masks have 2-5 layers and are designed to keep large particles and splashes out of your nose and mouth. Some face masks will have an N95 rating. This is a rating designated by the government that means the mask can block about 95 percent of particles that are 0.3 microns in size or larger.