The Centers for Disease Control and Prevention has cautioned that 60% of the KN95 masks in the U.S. are fake.

The CDC shared some tips on how to identify a counterfeit mask.

It includes:

No markings at all on the filtering facepiece respirator.

No approval (TC) number on filtering facepiece respirator or headband.

No NIOSH markings.

NIOSH spelled incorrectly.

Presence of decorative fabric or other decorative add-ons (e.g., sequins).

Claims of approval for children (NIOSH does not approve any type of respiratory protection for children).

Filtering facepiece respirator has ear loops instead of headbands.