This fact sheet explains what you should look for to determine if an N95 is NIOSH approved, including required labeling and where to look to confirm an approval number.
Zovator (Harley) N95 Mask NIOSH N95 TC-84A-6973 – Armbrust American
NIOSH N95 Particulate Filtering Facepiece Respirators (Pack of 20) — MEDLEE
KleenGuard™ N95 Particulate Respirator: Pouch Style (53899), NIOSH-Approved, Made in USA, Regular Size, 20 Respirators/Carton, 12 Cartons/Case, 240 Respirators/Case
Filtration efficiency of makeshift material masks vs . surgical/procedure masks and/or filtering facepiece respirators: a narrative review - Louie - Journal of Public Health and Emergency
How to Tell if Your N95® Respirator is NIOSH Approved
3M Aura 1870+ Health Care N95 NIOSH Certified Particulate Respirator made in Canada
Your Guide To The Best Face Masks For COVID-19 – Forbes Health
Medsup NIOSH N95 Particulate Respirator, 20 Masks
WellBefore NIOSH certified N95 masks are affordable, effective
Zenith Safety Products Particulate Respirator, N95, NIOSH Certified, Medium/Large
How to check if N95 respirator is real: signs of counterfeit masks