McKesson Brand - Surgical Mask McKesson ASTM Level 1 Tie Closure One Size Fits Most [50/BX] (206484_BX)

Classic style with ties. Comfortable, cool, and breathable. ASTM F2100-11 - Level 1 Barrier. Fluid Resistance: ASTM F1862 at 80 mmHg. BFE in excess of 98%. PFE in excess of 98%. Delta-P: Less than or equal to 2.4. Flammability: Class 1.