The people in Hong Kong learned how to make their own and they work well. It's not hard and used readily available materials. https://www.scmp.com/news/hong-ko

The people in Hong Kong learned how to make their own and they work well. It's not hard and used readily available materials. https://www.scmp.com/news/hong-kong/health-environment/article/3050689/how-make-your-own-mask-hong-kong-scientists https://www.scmp.com/news/hong-kong/health-environment/artic... Instructions in English.