A non-medical grade face covering is something which safely covers the nose and mouth. This could be a reusable or single-use face covering. This could also be a scarf, bandana, religious garment or hand-made cloth covering but these must securely fit round the side of the face.
Face coverings are largely intended to protect others, not the wearer, against the spread of infection because they cover the nose and mouth, which are the main confirmed sources of transmission of coronavirus (COVID-19).