Just read an article this morning in today's Winnipeg Free Press about this company. Their mask kills COVID-19 although it said it takes minutes. Very expensive. It says they can be used for 24 hours in a hospital setting before discarding and longer if not in continuous use. Production capabilities are not very high at this time. There will be competition from different manufacturers as the technology required is understood by more scientists. But, I sure like where we stand with ZEN with much more than masks in our future!
https://ca.humnpharma.com/copper-guard-mask-retail/#benefits_section_go