Item： Folding acid gas protective mask（KN95）
Item No.： ZK 9505CV （valved）
Standard：GB2626-2006
Product mix：
Outer layer：Non Woven Layer
Second layer：Anti-dust Filter Material
Third layer：Activated Carbon Filter Material
Forth layer：Antibacteria Filter Material
Fifth layer：Nano Filter Material
Inner layer：Skin-friendly lining
Storage humidity: 80% MAX
Shelf life：Three years
