... 1.Soft.Comfortable.Odorless,Breathable2.No stimulus to human skin3.Filter pollen,dust and bacteria4.Used for clinical,housework,gardening, ... NELSON test standard and CE,ISO standard.2.Mini-fiber high electrostatic filter,filtration efficiency of dust & powder is over99%3.Repel ... dyes and gentle on the skin. Specification:MaterialPP nonwovenMelt Blown Filter+PP nonwovenWeight18/20/25/30 gsm PP + 20/25 ...