1. Type: Flat shape, 3-ply, non-sterile 2. Size: For adults 3. Outer Layer: Water-repellent non-woven 4. Middle Layer: High level static filtration non-woven 5. Inner Layer: Microfilter Thermal-bond non-woven 6. Nose band: PE iron wire
50pcs/box, 20boxes/carton
ASTM Level 1