■ 4 layer design.high efficiency filter layer,Soft ear strap, embedded nose bridge strip ■ Non-woven layer:Hypoallergenic soft good air permeability comfortable to wear dust prevention and sterilization ■ Through-air Non-Woven Fabric:Enhanced filtering of small particles ■ PP melt-blown:Good air permeability dust prevention and sterilization ■ Non-woven layer:Good air permeability dust prevention and sterilization ■ Application: Daily life protective , user work, school