Vented masks are examples of personal protective equipment used to protect the wearer from particles or liquids contaminating the face. The valved mask has been recommended by US experts as the best protection from SARS. The mask has a BFE (Bacterial Filtration Efficiency) of >99%. Dust Masks are the US equivalent of Europe. The masks are designed for use in infection control applications. Ventilated N95 Masks and similar high-filtration respirators provide the best protection against COVID-19. In addition, these masks are ISO and CE certified with B+C2 test reports.