... the main materials,without any toxic,irritating,stimulant or poison,and glass fiber free.B) All products are made in our dust ... mask during the whole producing process,so we can guarantee high quality mask. **Our productsA) We were successfully certificated by EN149 ... many countries,such as America,Europe,Japan and so on. 4-ply non-woven CE face mask respirator with vavle and activated carbon fabric