HeiQ Viroblock NPJ03 is one of the first textile technologies in the world whose effectiveness against SARS-CoV-2 has been proven by an independent institution. SARS-CoV-2 is an enveloped virus from the coronavirus family that causes COVID-19. The tests were carried out by the Peter Doherty Institute for Infection and Immunity in Melbourne, Australia (Doherty Institute).The test was carried out on a 100% polyester fabric. The washable HeiQ masks are also made from a 100% polyester fabric, but it is not exactly the same fabric. The HeiQ disposable masks are made from a polypropylene non-woven fabric. Polyester is one of the most difficult fabrics to functionalize, and getting good results on polyester is a valid indication of effectiveness on fabrics made from cotton, viscose, nylon-polypropylene and their blends. The validation of the HeiQ masks was carried out according to the standard tests ISO 20743 and ISO 18184 and the standardized organisms.Sars-Cov-2 is a wild virus and is not included in the above standards. The tests with Sars-Cov-2 are carried out by research institutes and not by accredited laboratories. These institutes do not carry out routine tests. For this reason, the scientific community and regulators are proposing to use a surrogate of the coronavirus 229E, which is used by routine testing institutes to justify claims against Sars-Cov-2. Read more on the Department of Health, Australia website.