... 's Experience 3..ISO,CE,FDA 4.BFE 95% Specifications4ply Active Carbon Face Mask1.OEM Offered 2.7 Year's Experience ... ,CE,FDA 4.BFE 95% 4ply Active Carbon Face MaskProduct Specifications: Item Name4ply Active Carbon Face MaskMaterialPP + Active Carbon + Filter +PPSize17.5x9.5cm ... . Face mask with ties:(1ply/2ply/3ply/4ply) 4.3. Active carbon face mask:(3ply/4ply) 4.4. Face mask with ...