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By certification 
Our concern is: the comfort experience when you wear our masks. What we care about is: Sorry, we haven't made our products available to the whole world, face mask made in China. We specially prepared 3 surprises for you:
1.Hidden plastic nose bridge, in order to better fit your nose bridge, try to avoid bacteria invading your body as much as possible.
2. Fits three-dimensional protection, closely fits your cheeks, and does not feel tight.
3. All cotton wide flat elastic band can release the pressure of your ears as much as possible, so that you can wear it more comfortably.
http://www.prost-pharma.com/
