While we use an antimicrobial treated polyester/spandex that has has been tested to kill bacteria, viruses, protozoans, and fungi, it has not been tested to kill the current coronavirus. These masks are not intended for use as a replacement of a certified medical device. They are made to create a simple physical barrier to help contain sneezes and coughs. Please remember social distancing is still needed and that any mask out there is not a guarantee, they just help lower the risk of infection.