1.surgical mask (1ply,2ply,3ply,4ply) 2.bfe>99% 3.weight:20+25+28gsm 4.color:blue,green,white 5.ce iso9001 1.Soft.Comfortable.Odorless,Breathable2.No stimulus to human skin3.Filter pollen,dust and bacteria4.Used for clinical,housework,gardening,maintenance of the machine.etc5.Laboratories and factories for blocking liquid mists,harmful airborne chemicals and fine particles.Description:1.Conforms ...