The minimum values which the product must meet to be "in conformity" are listed below:

ASTM	Test	Level 1	Level 2	Level 3
F2101	*BFE (Bacterial Filtration Efficiency)	≥ 95%	≥ 98%	≥ 98%
F2299	**PFE (Particulate Filtration Efficiency)	≥ 95%	≥ 98%	≥ 98%
MIL-M-36954C	Delta P (Breathability)	< 4.0 H2O/cm2	< 5.0 H2O/cm2	< 5.0 H2O/cm2
F1862	Fluid Resistance to Syntetic Blood	80mm Hg	120mm Hg	160mm Hg
16 CFR PARTE 1610	Flame Spread	Class 1	Class 1	Class 1

• Level 1 – For procedures producing low amounts of fluid, spray and/or aersols.
• Level 2 - For procedures producing light to moderate amounts of fluid, spray and/or aerosols.
• Level 3 - For procedures producing moderate to heavy amounts of fluid, spray and/or aerosols.

* To perform BFE is used a biological aerosol of Staphylococcus aureus.
** To perform PFE are used 0.1 micron particles (for ASTM F2100) being representative for virus. Other conditions: 0.3,0.5 or 1.0 micron.

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