Non-medical masks are typically made of breathable fabric, and are washable and reusable. These are not the same as surgical masks or masks that healthcare workers wear. These non-medical masks are not effective at protecting the wearer as they do not filter air. However, they may offer some protection to others as the fabric may restrict some particles when breathing, speaking, coughing or sneezing.
Cloth masks should be washed after every use, be made up of at least three layers of fabric and cover your nose and mouth.
Cloth face masks are not permitted in laboratories, and should be replaced by disposable single-use masks as defined by the lab's Risk Assessment.