Material : PP, 16-60gsm
Layer:1-ply,2-ply,3-ply,4-ply
Size: 17.5*9.5cm/14.5*9.5cm/12.5*9.5cm/17.5*9.5cm/14.5*9/12.5*9cm
Color :blue , white , etc.
Style: with ear-loop
Features: latex free, high filter efficiency, adaptable nosepiece, fiberglass free
BFE: bacterial filtration efficiency>99%