ASTM Level 1 Procedure Mask - 98% filtration - Disposable - Aoshang - pack of 50

Aoshang Level 1 Disposable Earloop Face Masks Filtration efficiency (BFE) >98%  Sub-micron particulate efficiency at 0.1 micrometer > 98% Resistant to penetration by synthetic blood ( mmHg) 160 Differential pressure ( Delta Pressure in mm H2O/square cm) <6.0 Flame Spread Class 1 Description Disposable Filter Masks 3 Ply Earloop Package of 50 masks.  Wrap-around design, full coverage, built-in nose bridge fixing strip, soft fit to the skin contact surface, the rope is flexible and comfortable to wearThe product is a disposable mask, but it needs to be replaced in time when the mask is obviously dirty or damaged or the user feels that the breathing resistance has increased significantly.Can filter airborne particles, isolate droplets, saliva, etc. It can protect the nose and mouth from aerosols, liquid splashes, chemical pollutants, dust, automobile exhaust, and pollen. Do not use high temperature or alcohol disinfection, otherwise, it may damage the filtering effect of the