2.2 M pieces of surgical disposable mask
BFE - more than 95% efficency mean particle of 3.0 micron
PFR - more than 95%efficency with mean particle size of 0.1micron
Delta P not greater than 4.0 mm H2O/cmsq
Blood Penetration Pressure greater than 80mmHg Hg
Flammability class 1 or 2
