In the context of the coronavirus (COVID-19) outbreak, a face covering is something which safely covers the nose and mouth.
There are many types of face coverings available. Cloth face coverings and disposable face coverings work best if they are made with multiple layers (at least 2) and form a good fit around the nose and mouth. Face coverings should be made of a material that you find comfortable and breathable, such as cotton. Bandanas or religious garments may be used but are likely to be less effective if they do not fit securely around the face.
Face coverings are not classified as personal protective equipment (PPE) which is used in a limited number of settings to protect wearers against hazards and risks, such as surgical masks or respirators used in medical and industrial settings.
Face coverings protect the wearer and others against the spread of infection because they cover the nose and mouth, which are the main confirmed sources of transmission of virus that causes coronavirus infection (COVID-19).
Find out more about the differences between surgical face masks, PPE face masks, and face coverings.
Face coverings: when to wear one, exemptions, and how to make your own - GOV.UK (www.gov.uk)
Face visors, shields and transparent face coverings
A face visor or shield may be worn in addition to a face covering but not instead of one. This is because face visors or shields do not adequately cover the nose and mouth, and do not filter airborne particles.
Transparent face coverings may be worn by those who communicate through lip-reading or facial expressions. In order to be most effective, a face covering should fit securely around the face to cover the nose and mouth and be made of a breathable material capable of filtering airborne particles.