... ,yellow .active cabon face mask Antivirus,deodorant,filter bacteria,prevent dust and other effects.2.Especially suitable for containing organic gases ... ,acid volatile compounds,pesticides,SO2,CI2 and other irritant gases occasions,anti-virus,deodorizing effect is remarkable.3.Can ... of 5 Um airborne dust as well as variety of bacteria from the respiratory tract,it is the ideal protective ...