Surgical pleated mask (4-ply structure) small size white 50 pieces 57518 1 box (50 pieces)

This is a 4-ply medical mask that complies with US standard ASTM-F2100-19 Level 2. The 6mm rubber is not easily cut into the ears, so it is not painful even when worn for a long time. Color: White Quantity: 1 box (50 sheets) Material: Body and filter: Polyolefin, polyester, ear hook: Polyester, polyurethane, nose fit: Polyolefin Size: 160×90mm Bacterial Filtration Rate (BFE): 99% Particulate Filtration Efficiency (PFE): 99% Exhalation resistance: 1.8mmH2O/cm2 Blood impermeability: 120mmHG Flame spread: class 1