Table 2:

Results obtained at a university laboratory on single-pass filtration efficiency for ambient particle matter. Each row represents a single N95 mask. Filtration efficiency values are an average of four upstream and downstream measurements.

Model	Cycles	Filtration Efficiency (SD)
		0.3μm	0.5μm	1.0μm
3M 1860	0	97.66% (0.18)	99.05% (0.13)	99.68% (0.03)
	0	97.53% (0.18)	99.11% (0.23)	100.00% (0.00)
	1	99.20% (0.08)	99.70% (0.08)	99.90% (0.20)
	2	98.98% (0.10)	99.80% (0.06)	100.00% (0.00)
	2	99.42% (0.05)	99.89% (0.09)	99.91% (0.18)
	3	99.36% (0.12)	99.92% (0.06)	100.00% (0.00)
	4	98.55% (0.07)	99.59% (0.13)	99.88% (0.24)
	5	98.76% (0.03)	99.52% (0.16)	100.00% (0.00)
	10	98.45% (0.15)	99.39% (0.09)	100.00% (0.00)
KC/Halyard 46767 (duckbill)	0	99.91% (0.02)	99.95% (0.05)	100.00% (0.00)
	1	99.83% (0.07)	99.86% (0.17)	100.00% (0.00)
	2	99.91% (0.02)	99.98% (0.02)	100.00% (0.00)
	3	99.90% (0.04)	99.98% (0.04)	100.00% (0.00)
	4	99.69% (0.06)	99.80% (0.12)	99.89% (0.24)
	5	99.89% (0.03)	99.95% (0.07)	100.00% (0.00)
	10	99.86% (0.07)	99.97% (0.06)	100.00% (0.00)
Gerson 2130	1	96.06% (0.20)	98.90% (0.10)	99.68% (0.43)
	2	96.46% (0.19)	99.08% (0.11)	99.84% (0.19)
	3	95.17% (0.37)	98.80% (0.26)	99.65% (0.30)
3M 8210	0	98.09% (0.22)	99.42% (0.24)	99.82% (0.21)
	1	99.86% (0.04)	99.99% (0.02)	100.00% (0.00)
	2	99.52% (0.03)	99.93% (0.04)	100.00% (0.00)
	3	99.28% (0.06)	99.88% (0.04)	100.00% (0.00)
	4	98.90% (0.11)	99.40% (0.10)	100.00% (0.00)
	10	99.16% (0.15)	99.77% (0.13)	100.00% (0.00)
3M 9210/37021	0	99.75% (0.11)	99.92% (0.11)	100.00% (0.00)
	1	99.77% (0.16)	99.83% (0.19)	99.71% (0.37)
	2	99.70% (0.07)	99.92% (0.07)	100.00% (0.00)
	3	99.39% (0.18)	99.86% (0.04)	100.00% (0.00)
	4	98.68% (0.98)	99.01% (0.92)	99.05% (1.19)