1.Color:blue,white,green 2.diposable 3.3ply,with or without filter layer 3.dustproof,bird flu prevention 4.pp material,fabic Use and specification1.Used in hospitals, cleaning rooms, as well as for food preparation and industrial,dust proof,bird flu prevention2. In two primary styles, ear loops adopt soft band elastic or with ties made from spunbond3.Standard colors: white, green, blue, yellow, ...