... and venomous gas PFE and BFE>95% CE, ISO13485 certification activated carton face mask with ear-loop, 4-ply, made of ... mask is soft, without odor and without skin irritation.6. Liquid barrier: Surface anti-wet: the surface of face mask is ... less than 95%.8. Function: The huge surface area of activated charcoal gives it a large adsorption capability, it can adsorb ...