1,3-ply nonwoven facial mask, 2,Material:Non-Woven Fabric 3,Color:Blue,Green,White Certification:European CE 3-ply nonwoven facial mask:non woven face mask:2-ply or 3-ply non-woven face mask:3-ply face mask: MaterialHigh-quality non-wovenCraftsone-ply,two-ply,three-ply,four-ply,first-ply:25g-45g,Second to forth-ply:20g-30gColorWhite, blue, green, pinkFunction1. Filtration efficiency: under ...