A -virion™ layer in Pro-Larva has been certified to ISO 18184:2019 – a standard protocol to quantify the antiviral properties of textile materials, and can be readily incorporated in Type IIR medical masks (certified to EN14683:2019 standards). Copper is known to kill viruses, including COVID-19. Our copper nanoparticles create a larger surface area and have been independently tested to ensure they remain within the mask for maximum efficacy and safety for the wearer. On contact with the virus, the nanoparticles emit ions that penetrate the surface of the virus, destroying its genetic material preventing it from reproducing. This nanoparticle layer within the mask ensures enhanced protection compared to equivalent type II masks, for both the wearer and those in proximity.