Table 1 Mask models donated to major academic medical centers in Boston during the COVID-19 pandemic and their corresponding regulatory designation

N95 - NIOSH Approved

 Honeywell H901 N95 Particulate Respirator

 3M 1860 N95 Particulate Respirator^c

 3M 1860S N95 Particulate Respirator^c

 3M 1870+ N95 Particulate Respirator and Surgical Mask

 3M 8210V Particulate Respirator N95

 3M 8211 Particulate Respirator N95

 3M 8214 N95 Particulate Respirator

 3M 8511 N95 Particulate Respirator

 3M 8511 N95 Particulate Respirator COOL FLOW

 3M 9210/37021 N95 Particulate Respirator^c

 3M Aura 9211+/37193 Particulate Respirator N95

 3M N95 Drywall Sanding Respirator

 3M Particulate Respirator N95 07048

 3M Particulate Respirator 8000 N95

 3M 9502+ Particulate Respirator N95

 3M Particulate Respirator N95 9211/37022

 Rizhao 3Q SanQi RIZSQ100Sb N95^c

 AlphaProTech N95 Particulate Respirator Positive Facial Lock

 San Huei SH9550 N95^c

 Emerald Particulate Respirator N95

 Gerson 1730 N95 Disposable Particulate Respirator^c

 Gerson 1740 Disposable Particulate Respirator N95

 Gerson 2735 Particulate Respirator N95

 Halyard Fluidshield 3 N95 Particulate Filter Respirator and Surgical Mask

 HDX N95 Respirator Mask Contour Fit

 Jackson R10 Particulate Respirator Dual Valves N95

 Kimberly-Clark N95 62126

 Kimberly-Clark TECNOL 46727 Fluidshield PFR95 N95 Particulate Filter Respirator

 Kimberly-Clark TECNOL 46767 WITH SAFETY SEAL Fluidshield PFR95 N95 Particulate Filter Respirator^c

 Kimberly-Clark TECNOL 46827 Fluidshield PFR95 N95 Particulate Filter Respirator: Small

 Majestic N95 Particulate Respirator 74-905

 Majestic N95 Particulate Respirator with Valve 74-906

 Milwaukee N95 Valved Respirator

 Moldex 2200 N95 Particulate Respirator

 Moldex 2300 N95

 ONE-fit N95 Healthcare Particulate Respirator and Surgical Mask

 Safety Works N95 Respirator

 SafetyPlus N95 SP8265

 VWR N95 Disposable Respirator

 3M 8200 Respirator N95

 Medicom N95

 3M 8210 & 8210 Plus Particulate Respirator N95^c

 Medline NIOSH N95

 HDX N95 Respirator Mask

 3M VFLEX N95 Mask

 3M 9010 CN N95 Masks

 Aegis N95 Disposable Respirator

 Aegis N95 Disposable Respirator with Exhalation Valve

 Airtek 972 NIOSH Approved N95

 Cardinal Health N95-ML^c

 Cardinal Health N95-S^c

 SAS Safety Corp Particulate Respirator N95

KN95 - Appendix A ("Authorized Imported, Non-NIOSH Approved Respirators")

 3M 9501+ KN95 Particulate Respirator

 aRUN Industrial Co N9 KN95^c

 Jinan Vhold Co. VH95 KN95^{b c}

 Powecom KN95 Protective Mask

 Aoxing KN95^c

 HuaGuang Communication Disposable Face Mask KN95^{b c}

 3M 9541 KN95 Masks

KN95 - Not on Appendix A

 ZKG 9501 KN95

 CM KN-95 White Folding Respirator, 6002A-1 KN95

 FITTOP KN95

 LJK KN95 Stereo Protective Mask

 Urance KN95^c

 JinLiLaiSi KN-95 Medical Mask

 LanShiOrm KN95 Mask

 Hui Xin KN95 Mask

 DingHang KN95 9001

 BRI-2100 KN95 Mask

 Yuxu (雨旭) 9901 KN95^c

 Yimengshan (沂蒙山) 9201 KN95^c

 Energy Fortress KN95 Mask

 SKOOGH KN95

 Graphene SNN70370B KN95^c

 SNIPPET (施奈邦) SNB9501 KN95^c

 Dr MFYAN KN95

 Unmarked KN95 (multiple)^c

FFP2- Not on Appendix A

 3M K112 FFP2^c

 Guangzhou Kanglv 9501 FFP2^c

Known or Suspected Counterfeit^a

 Burvagy Disposable Dust Mask N95 Approved

 Dasheng N95 Respirator Mask DTC3B

 Raxwell N95 Respirator RX9501P

 SANBANG 9051A

 Da Sheng Niosh N95 Respirator Mask DTC3X

 Dasheng N95 Respirator Mask DTC3W

 NIOSH N95 Approved AirTek 9716

 Eco Solutions N95 Particulate Respirator

Elastomeric

 3M 6100/07024 Half Facepiece Reusable Respirators

 3M 6291/07002 P100 Particulate Filters

Other Standards (P100, P95, R95, etc)

 3M 8233 N100 Particulate respirator

 Moldex 4700 N100

 Amston 1802-N99 Particulate Respirator

 3M 8293 P100 Respirator Particulate Mask

 3M 8271 P95 Respirator Particulate Mask

 3M 8247CN R95

 3M 8240 R95

 Cleanwell KF94

Not NIOSH Approved or Missing from Certified Equipment List

 SolidWork Foldable Dust Mask 9600V-N95

 3M 29211 Particulate Respirator

 3M 8102 Mask

 3M Disposable Respirator

 3M Odor Respirator

 3M Performance Filter

 3M Performance Respirator

 AOSafety Sanding Drywall Fiberglass Respirator

 Basecamp Particulate Respirator

 SAS Safety Corp Nuisance Dust Mask

 Shenzhen Health Technology N95

 ESound Med N95 Protective Mask