High quality product and made in Taiwan Filters out bacteria, dust, pollen, and smog Surface Layer: Water repellent; Middle Layer: Static filtration; Inner Layer: Comfort composite material with moisture control According to Nelson test report for the BFE (Bacteria Filtration Efficiency) product filters up to 99% at 3 µ m particle size Double track plastic strip with quality bending properties Colorful elastic earloop: Custom color for different styles International Standards: ISO13485,CE, FDA Registered, G.M.P. Type: 3ply non-woven medical mask Earloop: Elastic Material: PP nonwoven fabric, Melt-blown, ES Color: Sky Blue Size: 17.5*9.5cm (Adult) Packing: 50pc Box Made in Taiwan EXP: 5 years