Get fresh air
Now the air environment becomes terrible without protection. Prost is working with you to fight against all kinds of bacteria. Our masks use 25g/m2 thick melt blown cloth; 3 layers of protection and 3 layers of filtration; strict use of national standards for manufacturing, safe and reliable(The certificate is shown in the attachment below); masks are porous and breathable, lightweight and easy to carry; fine and soft workmanship fits the face, no burrs; low sensitivity and no irritation , Protection while protecting your facial skin.
http://www.prost-pharma.com/