Maybe you and I have different medical masks in mind? I was talking about masks like this: https://cdn.shopify.com/s/files/1/0080/6830/0851/products/6_H2e77544

Maybe you and I have different medical masks in mind? I was talking about masks like this: https://cdn.shopify.com/s/files/1/0080/6830/0851/products/6_H2e77544679464ffab917e50b7b651d34G_1200x1200.jpg?v=1583272133 https://cdn.shopify.com/s/files/1/0080/6830/0851/products/6_... https://www.123rf.com/photo_138981777_stock-vector-person-wearing-disposable-medical-surgical-face-mask-to-protect-against-high-air-toxic-pollution-cit.html https://www.123rf.com/photo_138981777_stock-vector-person-we... https://phonetub.com/products/100-disposable-face-surgical-medical-mask-dental-anti-dust-flu-mouth-ear-loop https://phonetub.com/products/100-disposable-face-surgical-m... The main problem with blue masks and home made is that they tend to get wet from breath and their effectiveness go down the drain.