Evaluation of Decontaminated N95 Respirators 

Date Tested: 5/18/2020 – 6/1/2020

Respirator Model(s): 3M 8511, 3M 1860, 3M 8210, 3M V-flex 1804, Moldex 2200, Moldex 1512, Sperian 1125, Sperian 

1105, Sperian One-Fit

Tests: Filtration with NaCl (modified version of STP-0059), Manikin Fit Factor with Static Advanced Headform, and Strap 

Integrity with Tensile Testing 

Decontamination Method: VPHP 

Decontamination Cycles: 5, 10, 15, and 20 cycles 

While decontamination and reuse of FFRs are not consistent with standard and approved usage, these options 

may need to be considered when FFR shortages exist. This assessment was developed to quantify the filtration 

efficiency and manikin fit factor1 of an N95 respirator that has been decontaminated. This assessment is not to 

determine the effectiveness of the decontamination procedure at killing pathogenic microorganisms. The results 

provided in this report are specific to the subset of samples that were provided to NPPTL for evaluation. These 

results may be used to update the CDC guidance for Crisis Capacity Strategies (during known shortages). 

231 respirators that were unworn and not subjected to any pathogenic microorganisms were submitted for 

evaluation. This included 15 respirators that were subjected to 5 cycles of the VPHP decontamination process, 

45 respirators subjected to 10 cycles, 15 respirators subjected to 15 cycles, 120 respirators subjected to 20 

cycles, and an additional 36 respirators that served as controls. Figure 1 photos document the procedures used. 

The samples were tested using a modified version of the NIOSH Standard Test Procedure (STP) TEB-APRSTP-0059 to determine particulate filtration efficiency. The TSI, Inc. model 8130 using sodium chloride aerosol 

was used for the filtration evaluation. For the laboratory fit evaluation, a static manikin headform was used to 

quantify changes in manikin fit factor. The TSI, Inc. PortaCount® PRO+ 8038 in “N95 Enabled” mode was used 

for this evaluation. Additionally, tensile strength testing of the straps was performed to determine changes in 

strap integrity. The Instron® 5943 Tensile Tester was used for this evaluation. The full assessment plan can be 

found here. 

Filtration Efficiency Results All respirators measured more than 95%. See Tables 1, 4, 7, 10, 13, 16, 19, and 22. 

Manikin Fit Factor Results: The manikin fit factor showed passing fit factors (≥ 100) for the following respirators 

evaluated: 3M 1860 (15 and 20 cycles), 3M 8511 (5 and 10 cycles), 3M 8210 (20 cycles), and Moldex 1512 (20 

cycles). The manikin fit test procedure used in this assessment did not show any detriments in fit associated with 

the decontamination method used for these models/cycles. 

The manikin fit factor did not show passing fit factors for all samples of the following models: 3M V-flex 1804 (20 

cycles), Moldex 2200 (20 cycles), Sperian N1105 (20 cycles), and Sperian N1125 (10 and 20 cycles). 

The Sperian One-Fit (10 and 20 cycles) could not be assessed due to the inability to achieve adequate fit on the 

control respirators. 

1The American Industrial Hygiene Association defines the Manikin Fit Factor as “An expression related to the amount of leakage measured through the 

face or neck seal of a respirator mounted to a manikin under specified airflow and environmental conditions. If the challenge to the seal is an airborne 

substance, it is the ratio of its airborne concentration outside the respirator divided by the concentration that enters the respirator through the seal. If the 

challenge is airflow or air pressure, conditions and assumptions for quantifying leakage must be specified. Leakage from other sources (e.g., air purifying 

elements) must be essentially zero. The respirator may be mounted to the manikin without sealants; be partially sealed to the manikin; or be sealed to the 

manikin with artificially induced leaks.” 
See Tables 2, 5, 8, 11, 14, 17, 20, and 23 for manikin fit factor results.

Strap Integrity Results: Decontaminated 3M V-flex 1804 (20 cycles) straps had a yellow tint, while the control 

straps were white. No visual degradation of the straps from other models was observed. 

Increases in recorded force for both top and bottom straps were seen in the following models: 3M 1860 (15 and 

20 cycles), 3M 8511 (5 and 10 cycles), 3M V-flex 1804 (20 cycles), Moldex 2200 (20 cycles), and Sperian One-Fit 

(20 cycles). 

Decreases in recorded force for both top and bottom straps were seen in the following models: 3M 8210 (20 

cycles) and Moldex 1512 (20 cycles).

Inconsistent changes were shown between the top and bottom straps, with the top strap showing an increase in 

recorded force and the bottom strap showing a decrease in force, for the following models: Sperian N1105 (20 

cycles), Sperian One-Fit (10 cycles), Sperian N1125 (10 and 20 cycles). 

While the exact correlation between the force exerted by straps and fit is not well understood, higher force 

values may be associated with a tighter fit of the respirator to the face. Significant reductions in this force would 

be associated with a loss of elasticity of the straps, thereby reducing their ability to create a tight fit. See Tables

3, 6, 9, 12, 15, 18, 21, and 24.
 

 

Figure 1. Laboratory Test Photos
Table 1. Filter Efficiency Evaluation – 3M 1860

Notes:

• The test method utilized in this assessment is not the NIOSH standard test procedure that is used for certification 

of respirators. Respirators assessed to this modified test plan do not necessarily meet the requirements of STP0059, and therefore cannot be considered equivalent to N95 respirators that were tested to STP-0059. 

Respirator Model, 

Decon Method, # 

of cycles

Treated 

Sample #

Flow Rate

(Lpm)

Initial Filter 

Resistance

(mmH2O)

Initial Percent 

Leakage (%)

Maximum 

Percent 

Leakage (%)

Filter 

Efficiency 

(%)

3M 1860, 

VPHP, 15 cycles

Min Fil Eff: 99.32%

Max Fil Eff: 99.76%

1

85 10.4 0.312 0.478 99.52

2

85 9.6 0.544 0.685 99.32

3

85 9.8 0.247 0.372 99.63

4

85 10.2 0.376 0.493 99.51

5

85 10.4 0.350 0.410 99.59

6

85 9.4 0.220 0.275 99.73

7

85 9.5 0.303 0.375 99.63

8

85 9.9 0.363 0.474 99.53

9

85 9.6 0.200 0.298 99.70

10 85 10.4 0.188 0.241 99.76

Control 1 85 9.0 0.363 0.416 99.58

3M 1860, 

VPHP, 20 cycles

Min Fil Eff: 99.16%

Max Fil Eff: 99.74%

1 85 10.1 0.515 0.842 99.16

2 85 10.2 0.314 0.379 99.62

3 85 9.9 0.345 0.427 99.57

4 85 9.8 0.244 0.336 99.66

5 85 10.3 0.349 0.406 99.59

6 85 11.1 0.389 0.494 99.51

7 85 10.2 0.279 0.367 99.63

8 85 11.0 0.333 0.444 99.56

9 85 9.8 0.567 0.759 99.24

10 85 8.8 0.193 0.259 99.74

Control 2 85 9.7 0.374 0.459 99.54
Table 2. Manikin Fit Evaluation - 3M 1860

Manikin Fit Factor of Decontaminated N95s

Respirator 

Model, Decon 

Method, # of 

cycles

Treated

Sample #

mFF Normal 

Breathing 1

mFF Deep 

Breathing

mFF Normal 

Breathing 2

Overall 

Manikin Fit 

Factor

3M 1860,

VPHP, 15 cycles

Static Advanced 

Medium 

Headform 

(Hanson Robotics)

11 157 122 200+ 153

12 200+ 181 200+ 194

13 200+ 151 200+ 181

14 200+ 200+ 200+ 200+

15 164 68 121 104

Control 3

200+ 161 200+ 185

3M 1860,

VPHP, 20 cycles

Static Advanced 

Medium 

Headform 

(Hanson Robotics)

11 200+ 200+ 200+ 200+

12 200+ 200+ 200+ 200+

13 200+ 200+ 200+ 200+

14 200+ 200+ 200+ 200+

15 143 121 139 134

Control 4

200+ 200+ 200+ 200+

Notes:

• Per OSHA 1910.134(f)(7), if the fit factor as determined through an OSHA-accepted quantitative fit testing protocol 

is equal to or greater than 100 for tight-fitting half facepieces, then the fit test has been passed for that respirator.

• This assessment does not include fit testing of people and only uses two exercises (normal and deep breathing) on 

a manikin headform. 

• This assessment is a laboratory evaluation using a manikin headform and varies greatly from the OSHA individual 

fit test. This headform testing only includes normal breathing and deep breathing on a stationary (non-moving) 

headform; therefore, fit results from this assessment cannot be directly translated to using the standard OSHAaccepted test. Instead, this testing provides an indication of the change in fit performance (if any) associated with 

the decontamination of respirators. 
Table 3. Strap Integrity Evaluation – 3M 1860

Tensile Force in Respirator Straps of Decontaminated N95s

(recorded force values are at 150% strain)

Respirator Model, Decon 

Method, # of cycles Straps from Treated Sample # Force in Top Strap (N)

Force in Bottom 

Strap (N)

3M 1860,

VPHP, 15 cycles

1 3.335 3.787

2 3.221 3.563

3 3.246 3.863

Decontaminated Strap 

Average 3.267 3.738

Control 1 2.701 2.534

Control Strap Average 2.669 2.615

% Change

((Deconned - Controls) / 

Controls)

22.42 42.96

3M 1860,

VPHP, 20 cycles

1 3.302 3.386

2 3.313 3.773

3 3.382 3.75

Decontaminated Strap 

Average 3.332 3.636

Control 2 2.637 2.695

Control Strap Average 2.669 2.615

% Change

((Deconned - Controls) / 

Controls)

24.85 39.08
Table 4. Filter Efficiency Evaluation – 3M 8511

Respirator Model, 

Decon Method, # 

of cycles

Treated 

Sample #

Flow Rate

(Lpm)

Initial Filter 

Resistance

(mmH2O)

Initial Percent 

Leakage (%)

Maximum 

Percent 

Leakage (%)

Filter 

Efficiency 

(%)

3M 8511, 

VPHP, 5 cycles

Min Fil Eff: 99.63%

Max Fil Eff: 99.81%

1

85 6.6 0.277 0.334 99.67

2

85 6.5 0.264 0.287 99.71

3

85 6.5 0.224 0.296 99.70

4

85 6.6 0.257 0.336 99.66

5

85 6.5 0.299 0.368 99.63

6

85 6.5 0.137 0.199 99.80

7

85 6.3 0.141 0.190 99.81

8

85 6.6 0.229 0.279 99.72

9

85 6.8 0.200 0.245 99.76

10 85 6.7 0.272 0.344 99.66

Control 1 85 6.5 0.451 0.485 99.52

3M 8511, 

VPHP, 10 cycles

Min Fil Eff: 99.46%

Max Fil Eff: 99.88%

1 85 7.1 0.076 0.177 99.82

2 85 6.9 0.074 0.120 99.88

3 85 7.1 0.136 0.189 99.81

4 85 6.5 0.238 0.372 99.63

5 85 6.3 0.164 0.243 99.76

6 85 6.7 0.245 0.290 99.71

7 85 6.5 0.187 0.288 99.71

8 85 6.8 0.322 0.398 99.60

9 85 6.5 0.349 0.426 99.57

10 85 6.5 0.417 0.541 99.46

Control 2 85 6.8 0.359 0.398 99.60

Notes:

• The test method utilized in this assessment is not the NIOSH standard test procedure that is used for certification 

of respirators. Respirators assessed to this modified test plan do not necessarily meet the requirements of STP0059, and therefore cannot be considered equivalent to N95 respirators that were tested to STP-0059. 
Table 5. Manikin Fit Evaluation – 3M 8511

Manikin Fit Factor of Decontaminated N95s

Respirator 

Model, Decon 

Method, # of 

cycles

Treated

Sample #

mFF Normal 

Breathing 1

mFF Deep 

Breathing

mFF Normal 

Breathing 2

Overall 

Manikin Fit 

Factor

3M 8511,

VPHP, 5 cycles

Static Advanced 

Medium 

Headform 

(Hanson Robotics)

11 200+ 200+ 200+ 200+

12 200+ 200+ 200+ 200+

13 200+ 180 200+ 193

14 200+ 200+ 200+ 200+

15 200+ 200+ 200+ 200+

Control 3

200+ 172 200+ 190

3M 8511,

VPHP, 10 cycles

Static Advanced 

Medium 

Headform 

(Hanson Robotics)

11 200+ 200+ 200+ 200+

12 200+ 200+ 200+ 200+

13 200+ 200+ 200+ 200+

14 200+ 200+ 200+ 200+

15 200+ 200+ 200+ 200+

Control 4

200+ 200+ 200+ 200+

Notes:

• Per OSHA 1910.134(f)(7), if the fit factor as determined through an OSHA-accepted quantitative fit testing protocol 

is equal to or greater than 100 for tight-fitting half facepieces, then the fit test has been passed for that respirator.

• This assessment does not include fit testing of people and only uses two exercises (normal and deep breathing) on 

a manikin headform. 

• This assessment is a laboratory evaluation using a manikin headform and varies greatly from the OSHA individual 

fit test. This headform testing only includes normal breathing and deep breathing on a stationary (non-moving) 

headform; therefore, fit results from this assessment cannot be directly translated to using the standard OSHAaccepted test. Instead, this testing provides an indication of the change in fit performance (if any) associated with 

the decontamination of respirators. 
Table 6. Strap Integrity Evaluation – 3M 8511

Tensile Force in Respirator Straps of Decontaminated N95s

(recorded force values are at 150% strain)

Respirator Model, Decon 

Method, # of cycles Straps from Treated Sample # Force in Top Strap (N)

Force in Bottom 

Strap (N)

3M 8511,

VPHP, 5 cycles

1 3.647 3.355

2 3.62 3.217

3 3.574 3.316

Decontaminated Strap 

Average 3.614 3.296

Control 1 3.275 2.668

Control Strap Average 3.195 2.640

% Change

((Deconned - Controls) / 

Controls)

13.10 24.85

3M 8511,

VPHP, 10 cycles

1 3.948 3.285

2 3.237 3.218

3 3.862 3.273

Decontaminated Strap 

Average 3.682 3.259

Control 2 3.115 2.612

Control Strap Average 3.195 2.640

% Change

((Deconned - Controls) / 

Controls)

15.25 23.43
Table 7. Filter Efficiency Evaluation – 3M 8210

Respirator Model, 

Decon Method, # 

of cycles

Treated 

Sample #

Flow Rate

(Lpm)

Initial Filter 

Resistance

(mmH2O)

Initial Percent 

Leakage (%)

Maximum 

Percent 

Leakage (%)

Filter 

Efficiency 

(%)

3M 8210, 

VPHP, 20 cycles

Min Fil Eff: 98.19%

Max Fil Eff: 99.90%

1

85 7.0 0.428 0.446 99.55

2

85 7.3 0.109 0.151 99.85

3

85 7.0 0.146 0.223 99.78

4

85 7.5 0.095 0.131 99.87

5

85 7.7 1.700 1.810 98.19

6

85 7.3 0.124 0.174 99.83

7

85 7.6 0.102 0.156 99.84

8

85 7.2 0.154 0.235 99.77

9

85 7.4 0.111 0.171 99.83

10 85 7.0 0.061 0.098 99.90

Control 1 85 8.4 0.114 0.142 99.86

Control 2 85 7.4 0.119 0.188 99.81

Notes:

• The test method utilized in this assessment is not the NIOSH standard test procedure that is used for certification 

of respirators. Respirators assessed to this modified test plan do not necessarily meet the requirements of STP0059, and therefore cannot be considered equivalent to N95 respirators that were tested to STP-0059. 
Table 8. Manikin Fit Evaluation – 3M 8210

Manikin Fit Factor of Decontaminated N95s

Respirator Model, 

Decon Method, # 

of cycles

Treated

Sample #

mFF Normal 

Breathing 1

mFF Deep 

Breathing

mFF Normal 

Breathing 2

Overall 

Manikin Fit 

Factor

3M 8210,

VPHP, 20 cycles

Static Advanced 

Medium Headform 

(Hanson Robotics)

11 200+ 150 200+ 180

12 200+ 200+ 200+ 200+

13 200+ 200+ 200+ 200+

14 200+ 139 200+ 175

15 200+ 170 200+ 189

Control 3

200+ 200+ 200+ 200+

Control 4 200+ 200+ 200+ 200+

Notes:

• Per OSHA 1910.134(f)(7), if the fit factor as determined through an OSHA-accepted quantitative fit testing protocol 

is equal to or greater than 100 for tight-fitting half facepieces, then the fit test has been passed for that respirator.

• This assessment does not include fit testing of people and only uses two exercises (normal and deep breathing) on 

a manikin headform. 

• This assessment is a laboratory evaluation using a manikin headform and varies greatly from the OSHA individual 

fit test. This headform testing only includes normal breathing and deep breathing on a stationary (non-moving) 

headform; therefore, fit results from this assessment cannot be directly translated to using the standard OSHAaccepted test. Instead, this testing provides an indication of the change in fit performance (if any) associated with 

the decontamination of respirators. 

Table 9. Strap Integrity Evaluation – 3M 8210

Tensile Force in Respirator Straps of Decontaminated N95s

(recorded force values are at 150% strain)

Respirator Model, Decon 

Method, # of cycles Straps from Treated Sample # Force in Top Strap (N)

Force in Bottom 

Strap (N)

3M 8210,

VPHP, 20 cycles

1 4.491 4.318

2 4.407 3.976

3 4.435 4.072

Decontaminated Strap 

Average 4.444 4.122

Control 1 4.741 4.925

Control 2 4.729 4.966

Control Strap Average 4.735 4.9455

% Change

((Deconned - Controls) / 

Controls)

-6.14 -16.65
Table 10. Filter Efficiency Evaluation – 3M V-flex 1804

Respirator Model, 

Decon Method, # 

of cycles

Treated 

Sample #

Flow Rate

(Lpm)

Initial Filter 

Resistance

(mmH2O)

Initial Percent 

Leakage (%)

Maximum 

Percent 

Leakage (%)

Filter 

Efficiency 

(%)

3M V-Flex 1804, 

VPHP, 20 cycles

Min Fil Eff: 99.00%

Max Fil Eff: 99.67%

1

85 4.9 0.256 0.357 99.64

2

85 5.1 0.227 0.331 99.67

3

85 4.8 0.283 0.384 99.62

4

85 4.8 0.233 0.377 99.62

5

85 5.0 0.272 0.402 99.60

6

85 5.0 0.411 0.510 99.49

7

85 5.1 0.439 0.536 99.46

8

85 5.0 0.988 1.000 99.00

9

85 5.3 0.410 0.507 99.49

10 85 7.0 0.384 0.502 99.50

Control 1 85 5.3 0.214 0.342 99.66

Control 2 85 4.9 0.161 0.301 99.70

Notes:

• The test method utilized in this assessment is not the NIOSH standard test procedure that is used for certification 

of respirators. Respirators assessed to this modified test plan do not necessarily meet the requirements of STP0059, and therefore cannot be considered equivalent to N95 respirators that were tested to STP-0059. 
Table 11. Manikin Fit Evaluation – 3M V-flex 1804

Manikin Fit Factor of Decontaminated N95s

Respirator Model, 

Decon Method, # 

of cycles

Treated

Sample #

mFF Normal 

Breathing 1

mFF Deep 

Breathing

mFF Normal 

Breathing 2

Overall 

Manikin Fit 

Factor

3M V-Flex 1804,

VPHP, 20 cycles

Static Advanced 

Medium Headform 

(Hanson Robotics)

11 200+ 200+ 200+ 200+

12 200+ 200+ 200+ 200+

13 139 116 132 128

14 126 63 88 85

15 200+ 200+ 200+ 200+

Control 3

200+ 200+ 200+ 200+

Control 4 200+ 200+ 200+ 200+

Notes:

• Per OSHA 1910.134(f)(7), if the fit factor as determined through an OSHA-accepted quantitative fit testing protocol 

is equal to or greater than 100 for tight-fitting half facepieces, then the fit test has been passed for that respirator.

• This assessment does not include fit testing of people and only uses two exercises (normal and deep breathing) on 

a manikin headform. 

• This assessment is a laboratory evaluation using a manikin headform and varies greatly from the OSHA individual 

fit test. This headform testing only includes normal breathing and deep breathing on a stationary (non-moving) 

headform; therefore, fit results from this assessment cannot be directly translated to using the standard OSHAaccepted test. Instead, this testing provides an indication of the change in fit performance (if any) associated with 

the decontamination of respirators. 

• BOLD overall manikin fit factors < 100.

Table 12. Strap Integrity Evaluation – 3M V-flex 1804

Tensile Force in Respirator Straps of Decontaminated N95s

(recorded force values are at 150% strain)

Respirator Model, Decon 

Method, # of cycles Straps from Treated Sample # Force in Top Strap (N)

Force in Bottom 

Strap (N)

3M V-Flex 1804,

VPHP, 20 cycles

1 2.359 2.557

2 2.411 2.574

3 2.695 2.735

Decontaminated Strap 

Average 2.488 2.622

Control 1 2.308 2.455

Control 2 2.385 2.495

Control Strap Average 2.3465 2.475

% Change

((Deconned - Controls) / 

Controls)

6.04 5.94
Table 13. Filter Efficiency Evaluation – Moldex

Respirator Model, 

Decon Method, # 

of cycles

Treated 

Sample #

Flow Rate

(Lpm)

Initial Filter 

Resistance

(mmH2O)

Initial Percent 

Leakage (%)

Maximum 

Percent 

Leakage (%)

Filter 

Efficiency 

(%)

Moldex 1512, 

VPHP, 20 cycles

Min Fil Eff: 97.56%

Max Fil Eff: 99.53%

1

85 9.0 2.18 2.44 97.56

2

85 8.9 1.23 1.23 98.77

3

85 9.1 1.41 1.41 98.59

4

85 9.4 1.02 1.02 98.98

5

85 9.8 0.957 0.957 99.04

6

85 10.0 0.462 0.474 99.53

7

85 9.0 1.14 1.15 98.85

8

85 10.0 1.22 1.25 98.75

9

85 9.8 0.658 0.658 99.34

10 85 9.2 1.10 1.10 98.90

Control 1 85 10.5 0.780 0.780 99.22

Control 2 85 9.8 0.888 0.888 99.11

Moldex 2200, 

VPHP, 20 cycles

Min Fil Eff: 98.38%

Max Fil Eff: 99.46%

1 85 9.6 0.977 0.977 99.02

2 85 10.3 1.17 1.18 98.82

3 85 11.8 0.602 0.614 99.39

4 85 10.9 1.50 1.51 98.49

5 85 11.7 0.542 0.542 99.46

6 85 11.6 0.720 0.720 99.28

7 85 12.2 1.36 1.36 98.64

8 85 10.6 1.62 1.62 98.38

9 85 10.5 0.755 0.755 99.25

10 85 11.2 1.50 1.54 98.46

Control 1 85 9.7 2.00 2.01 97.99

Control 2 85 11.2 0.606 0.606 99.39

Notes:

• The test method utilized in this assessment is not the NIOSH standard test procedure that is used for certification 

of respirators. Respirators assessed to this modified test plan do not necessarily meet the requirements of STP0059, and therefore cannot be considered equivalent to N95 respirators that were tested to STP-0059. 
Table 14. Manikin Fit Evaluation – Moldex

Manikin Fit Factor of Decontaminated N95s

Respirator Model, 

Decon Method, # 

of cycles

Treated 

Sample #

mFF Normal 

Breathing 1

mFF Deep 

Breathing

mFF Normal 

Breathing 2

Overall 

Manikin Fit 

Factor

Moldex 1512, 

VPHP, 20 cycles

Static Advanced 

Medium Headform 

(Hanson Robotics)

11 200+ 200+ 200+ 200+

12 159 166 148 158

13 131 175 132 143

14 184 131 131 145

15 200+ 200+ 200+ 200+

Control 3

200+ 200+ 200+ 200+

Control 4 200+ 200+ 200+ 200+

Moldex 2200, 

VPHP, 20 cycles

Static Advanced 

Medium Headform 

(Hanson Robotics)

11 172 153 160 161

12 193 99 143 135

13 200+ 200+ 200+ 200+

14 108 76 92 90

15 182 107 155 141

Control 3

200+ 200+ 200+ 200+

Control 4 200+ 200+ 200+ 200+

Notes:

• Per OSHA 1910.134(f)(7), if the fit factor as determined through an OSHA-accepted quantitative fit testing protocol 

is equal to or greater than 100 for tight-fitting half facepieces, then the fit test has been passed for that respirator.

• This assessment does not include fit testing of people and only uses two exercises (normal and deep breathing) on 

a manikin headform. 

• This assessment is a laboratory evaluation using a manikin headform and varies greatly from the OSHA individual 

fit test. This headform testing only includes normal breathing and deep breathing on a stationary (non-moving) 

headform; therefore, fit results from this assessment cannot be directly translated to using the standard OSHAaccepted test. Instead, this testing provides an indication of the change in fit performance (if any) associated with 

the decontamination of respirators. 

• BOLD manikin fit factors < 100.
Table 15. Strap Integrity Evaluation – Moldex

Tensile Force in Respirator Straps of Decontaminated N95s

(recorded force values are at 150% strain)

Respirator Model, Decon 

Method, # of cycles Straps from Treated Sample # Force in Top Strap (N)

Force in Bottom 

Strap (N)

Moldex 1512,

VPHP, 20 cycles

1 3.007 2.856

2 3.017 2.908

3 2.88 2.738

Decontaminated Strap 

Average 2.968 2.834

Control 1 3.515 3.428

Control 2 3.427 3.282

Control Strap Average 3.471 3.355

% Change

((Deconned - Controls) / 

Controls)

-14.49 -15.53

Moldex 2200,

VPHP, 20 cycles

1 3.958 4.198

2 4.159 3.859

3 4.476 4.183

Decontaminated Strap 

Average 4.198 4.080

Control 1 4.229 4.054

Control 2 4.052 3.804

Control Strap Average 4.1405 3.929

% Change

((Deconned - Controls) / 

Controls)

1.38 3.84
Table 16. Filter Efficiency Evaluation – Sperian N1105

Respirator Model, 

Decon Method, # 

of cycles

Treated 

Sample #

Flow Rate

(Lpm)

Initial Filter 

Resistance

(mmH2O)

Initial Percent 

Leakage (%)

Maximum 

Percent 

Leakage (%)

Filter 

Efficiency 

(%)

Sperian N1105, 

VPHP, 20 cycles

Min Fil Eff: 99.75%

Max Fil Eff: 99.94%

1

85 10.9 0.065 0.069 99.93

2

85 11.8 0.085 0.085 99.92

3

85 11.3 0.082 0.092 99.91

4

85 12.3 0.051 0.059 99.94

5

85 11.8 0.064 0.072 99.93

6

85 13.6 0.058 0.061 99.94

7

85 12.3 0.205 0.247 99.75

8

85 13.1 0.195 0.212 99.79

9

85 13.3 0.146 0.165 99.84

10 85 12.7 0.163 0.197 99.80

Control 1 85 12.9 0.167 0.175 99.83

Control 2 85 14.2 0.161 0.183 99.82

Notes:

• The test method utilized in this assessment is not the NIOSH standard test procedure that is used for certification 

of respirators. Respirators assessed to this modified test plan do not necessarily meet the requirements of STP0059, and therefore cannot be considered equivalent to N95 respirators that were tested to STP-0059. 
Table 17. Manikin Fit Evaluation – Sperian N1105

Manikin Fit Factor of Decontaminated N95s

Respirator Model, 

Decon Method, # 

of cycles

Treated

Sample #

mFF Normal 

Breathing 1

mFF Deep 

Breathing

mFF Normal 

Breathing 2

Overall 

Manikin Fit 

Factor

Sperian N1105, 

VPHP, 20 cycles

Static Advanced 

Large Headform 

(Lunar Studios)

11 153 132 123 135

12 200+ 200+ 200+ 200+

13 200+ 200+ 200+ 200+

14 200+ 180 200+ 193

15 68 54 55 58

Control 3

131 184 187 163

Control 4 200+ 200+ 200+ 200+

Notes:

• Per OSHA 1910.134(f)(7), if the fit factor as determined through an OSHA-accepted quantitative fit testing protocol 

is equal to or greater than 100 for tight-fitting half facepieces, then the fit test has been passed for that respirator.

• This assessment does not include fit testing of people and only uses two exercises (normal and deep breathing) on 

a manikin headform. 

• This assessment is a laboratory evaluation using a manikin headform and varies greatly from the OSHA individual 

fit test. This headform testing only includes normal breathing and deep breathing on a stationary (non-moving) 

headform; therefore, fit results from this assessment cannot be directly translated to using the standard OSHAaccepted test. Instead, this testing provides an indication of the change in fit performance (if any) associated with 

the decontamination of respirators. 

• BOLD manikin fit factors < 100.

Table 18. Strap Integrity Evaluation – Sperian N1105

Tensile Force in Respirator Straps of Decontaminated N95s

(recorded force values are at 150% strain)

Respirator Model, Decon 

Method, # of cycles Straps from Treated Sample # Force in Top Strap (N)

Force in Bottom 

Strap (N)

Sperian N1105,

VPHP, 20 cycles

1 1.737 1.868

2 1.884 1.679

3 1.859 1.577

Decontaminated Strap 

Average 1.827 1.708

Control 1 1.719 1.778

Control 2 1.742 2.028

Control Strap Average 1.7305 1.903

% Change

((Deconned - Controls) / 

Controls)

5.56 -10.25
Table 19. Filter Efficiency Evaluation – Sperian One-Fit

Respirator Model, 

Decon Method, # 

of cycles

Treated 

Sample #

Flow Rate

(Lpm)

Initial Filter 

Resistance

(mmH2O)

Initial Percent 

Leakage (%)

Maximum 

Percent 

Leakage (%)

Filter 

Efficiency 

(%)

Sperian One-fit,

VPHP, 10 cycles

Min Fil Eff: 97.01%

Max Fil Eff: 99.80%

1

85 11.7 0.241 0.280 99.72

2

85 13.1 2.63 2.74 97.26

3

85 11.3 2.75 2.99 97.01

4

85 13.8 0.312 0.358 99.64

5

85 12.0 1.05 1.12 98.88

6

85 11.6 0.707 0.832 99.17

7

85 9.1 0.444 0.609 99.39

8

85 11.3 0.198 0.239 99.76

9

85 10.7 0.255 0.284 99.72

10 85 10.4 0.181 0.201 99.80

Control 1 85 10.8 0.121 0.176 99.82

Sperian One-fit,

VPHP, 20 cycles

Min Fil Eff: 99.42%

Max Fil Eff: 99.85%

1 85 10.9 0.199 0.222 99.78

2 85 11.2 0.300 0.338 99.66

3 85 11.4 0.117 0.152 99.85

4 85 11.5 0.337 0.353 99.65

5 85 9.7 0.516 0.579 99.42

6 85 11.8 0.312 0.340 99.66

7 85 11.4 0.235 0.258 99.74

8 85 10.7 0.245 0.300 99.70

9 85 11.0 0.348 0.383 99.62

10 85 10.0 0.550 0.647 99.35

Control 2 85 10.7 0.228 0.286 99.71

Notes:

• The test method utilized in this assessment is not the NIOSH standard test procedure that is used for certification 

of respirators. Respirators assessed to this modified test plan do not necessarily meet the requirements of STP0059, and therefore cannot be considered equivalent to N95 respirators that were tested to STP-0059. 
Table 20. Manikin Fit Evaluation – Sperian One-Fit

Manikin Fit Factor of Decontaminated N95s

Respirator Model, 

Decon Method, # 

of cycles

Treated

Sample #

mFF Normal 

Breathing 1

mFF Deep 

Breathing

mFF Normal 

Breathing 2

Overall 

Manikin Fit 

Factor

Sperian One-fit,

VPHP, 10 cycles

Static Advanced 

Medium Headform 

(Hanson Robotics)

11

n/a*

12

13

14

15

Control 3

2 3 2 2

Sperian One-fit,

VPHP, 20 cycles

Static Advanced 

Medium Headform 

(Hanson Robotics)

11

n/a*

12

13

14

15

Control 4 3 2 3 2

*unable to achieve adequate fit (overall mFF >= 100) on control respirators, so reliable fit test results cannot be reported

Notes:

• Per OSHA 1910.134(f)(7), if the fit factor as determined through an OSHA-accepted quantitative fit testing protocol 

is equal to or greater than 100 for tight-fitting half facepieces, then the fit test has been passed for that respirator.

• This assessment does not include fit testing of people and only uses two exercises (normal and deep breathing) on 

a manikin headform. 

• This assessment is a laboratory evaluation using a manikin headform and varies greatly from the OSHA individual 

fit test. This headform testing only includes normal breathing and deep breathing on a stationary (non-moving) 

headform; therefore, fit results from this assessment cannot be directly translated to using the standard OSHAaccepted test. Instead, this testing provides an indication of the change in fit performance (if any) associated with 

the decontamination of respirators. 

• BOLD manikin fit factors < 100.
Table 21. Strap Integrity Evaluation – Sperian One-Fit

Tensile Force in Respirator Straps of Decontaminated N95s

(recorded force values are at 150% strain)

Respirator Model, Decon 

Method, # of cycles Straps from Treated Sample # Force in Top Strap (N)

Force in Bottom 

Strap (N)

Sperian One-fit,

VPHP, 10 cycles

1 10.802 11.848

2 8.868 7.762

3 11.334 10.082

Decontaminated Strap 

Average 10.335 9.897

Control 1 8.939 9.461

Control Strap Average 8.725 10.270

% Change

((Deconned - Controls) / 

Controls)

18.46 -3.63

Sperian One-fit,

VPHP, 20 cycles

1 6.763 11.552

2 9.665 12.189

3 10.695 12.61

Decontaminated Strap 

Average 9.041 12.117

Control 2 8.51 11.079

Control Strap Average 8.725 10.270

% Change

((Deconned - Controls) / 

Controls)

3.63 17.98
Table 22. Filter Efficiency Evaluation – Sperian N1125

Respirator Model, 

Decon Method, # of 

cycles

Treated 

Sample #

Flow Rate

(Lpm)

Initial Filter 

Resistance

(mmH2O)

Initial Percent 

Leakage (%)

Maximum 

Percent 

Leakage (%)

Filter 

Efficiency 

(%)

Sperian N1125,

VPHP, 10 cycles

Min Fil Eff: 99.24%

Max Fil Eff: 99.83%

1

85 13.5 0.632 0.757 99.24

2

85 13.8 0.502 0.580 99.42

3

85 12.8 0.623 0.669 99.33

4

85 16.3 0.355 0.376 99.62

5

85 14.3 0.268 0.296 99.70

6

85 13.7 0.217 0.238 99.76

7

85 12.7 0.183 0.220 99.78

8

85 14.8 0.258 0.303 99.70

9

85 14.3 0.140 0.175 99.83

10 85 13.6 0.204 0.230 99.77

Control 1 85 13.9 0.197 0.221 99.78

Sperian N1125,

VPHP, 20 cycles

Min Fil Eff: 99.33%

Max Fil Eff: 99.85%

1 85 14.4 0.157 0.185 99.82

2 85 12.9 0.618 0.647 99.35

3 85 14.2 0.172 0.187 99.81

4 85 15.0 0.351 0.370 99.63

5 85 15.9 0.386 0.437 99.56

6 85 14.8 0.147 0.147 99.85

7 85 12.2 0.650 0.671 99.33

8 85 13.1 0.213 0.235 99.77

9 85 14.0 0.155 0.179 99.82

10 85 14.6 0.165 0.177 99.82

Control 2 85 14.5 0.178 0.194 99.81

Notes:

• The test method utilized in this assessment is not the NIOSH standard test procedure that is used for certification 

of respirators. Respirators assessed to this modified test plan do not necessarily meet the requirements of STP0059, and therefore cannot be considered equivalent to N95 respirators that were tested to STP-0059. 
Table 23. Manikin Fit Evaluation – Sperian N1125

Manikin Fit Factor of Decontaminated N95s

Respirator Model, 

Decon Method, # of 

cycles

Treated

Sample #

mFF Normal 

Breathing 1

mFF Deep 

Breathing

mFF Normal 

Breathing 2

Overall 

Manikin Fit 

Factor

Sperian N1125,

VPHP, 10 cycles

Static Advanced 

Large Headform 

(Lunar Studios)

11 200+ 106 200+ 155

12 156 146 176 158

13 143 111 120 123

14 200+ 168 148 169

15 108 72 94 89

Control 3

200+ 102 97 120

Sperian N1125,

VPHP, 20 cycles

Static Advanced 

Large Headform 

(Lunar Studios)

11 174 130 139 145

12 88 50 71 66

13 92 71 71 77

14 111 118 97 108

15 92 35 85 58

Control 4 178 125 177 156

Notes:

• Per OSHA 1910.134(f)(7), if the fit factor as determined through an OSHA-accepted quantitative fit testing protocol 

is equal to or greater than 100 for tight-fitting half facepieces, then the fit test has been passed for that respirator.

• This assessment does not include fit testing of people and only uses two exercises (normal and deep breathing) on 

a manikin headform. 

• This assessment is a laboratory evaluation using a manikin headform and varies greatly from the OSHA individual 

fit test. This headform testing only includes normal breathing and deep breathing on a stationary (non-moving) 

headform; therefore, fit results from this assessment cannot be directly translated to using the standard OSHAaccepted test. Instead, this testing provides an indication of the change in fit performance (if any) associated with 

the decontamination of respirators. 

• BOLD manikin fit factors < 100.
Table 24. Strap Integrity Evaluation – Sperian N1125

Tensile Force in Respirator Straps of Decontaminated N95s

(recorded force values are at 150% strain)

Respirator Model, Decon 

Method, # of cycles Straps from Treated Sample # Force in Top Strap (N)

Force in Bottom 

Strap (N)

Sperian N1125,

VPHP, 10 cycles

1 1.954 1.696

2 1.847 1.951

3 2.015 1.963

Decontaminated Strap 

Average 1.939 1.870

Control 1 1.748 1.967

Control Strap Average 1.772 1.959

% Change

((Deconned - Controls) / 

Controls)

9.44 -4.54

Sperian N1125,

VPHP, 20 cycles

1 1.837 1.894

2 1.732 1.769

3 1.76 1.837

Decontaminated Strap 

Average 1.776 1.833

Control 2 1.795 1.951

Control Strap Average 1.772 1.959

% Change

((Deconned - Controls) / 

Controls)

0.27 -6.41