ASTM Lv 2 / IIR

Surgical masks meeting ASTM Level 2 or Level 3 will be able to filter ≥98% bacteria and 0.1μm particulates, while ASTM Level 1 can only filter ≥95% bacteria。ASTM Level 3 performs better than ASTM Level 2 in terms of fluid resistance,while ASTM Level 1 has the best breathability yet the lowest bacteria filtration efficiency.

According to ASTM Standard F2100-11, there are 2 levels of protection
ASTM F2100-11 Standards ASTM Level 2 Mask  ASTM Level 3 Mask
Fluid Resistance, mmHg 120 160
BFE >= 98% >= 98%
PFE,@ 0.1 micron >= 98% >= 98%
Delta P,mm H20/cm2 < 5.0 < 5.0
Flame Spread Class 1 Class 1

Specifications

Bacterial Filtration Efficiency (BFE) ≥ 98%

Particulate Filtration Efficiency at 0.1 micron (PFE) ≥ 98% 

Differential Pressure < 6mm H2O/cm2 

Resistance to penetration by synthetic blood 120mm Hg 

Flame Spread Class 1 

Latex Free

Single Use Only

 

ASTM(The United States)

FDA required manufacturers to conduct the tests below:

Fluid Resistance

Differential Pressure (Delta P)

Bacterial Filtration Efficiency (BFE)

Particle Filtration Efficiency (0.1μm PFE)

Flammability