3 layer disposable mask
The outer layer and inner layer are spunbond non-woven fabric, and the middle layer is melt blown filter layer
Size: 17.5 x 9.5 cm
Non-Sterile
Material weight: 25g + 25g + 25g / m2
Bacterial Filtration Efficiency (BFE): 3.0 Microns ≥95%
Elastic ear loop
Quantity：50 pcs / Box
