Location: No returns. Design printed on antimicrobial treated polyester/spandex with a cotton back and pocket for filter (not included). These are not medical masks so if you're going to perform brain surgery, study hard and go to med school instead. Will not kill germs. Bathing in 70% alcohol might but don't do it. This mask is a super stylish simple barrier to help contain exhalations, sneezes and coughs for when you can't hold back high-speed bodily excretions. A mask may help lower the risk of infection and combining that with social distancing is even better.