Table 1.

A comparison between legitimate and potentially counterfeit FFR

	Legitimate	Potentially counterfeit
Design	Headbands	Ear loops
Markings	Approval number	No approval number
	Brand name or registered trademark	No name or altered name
	Filter class and filtering efficiency level	Filter class and filtering efficiency level can be both present or absent or spelled incorrectly
	Clear referring to national regulation	No markings or flawed reference
External appearance	No decorations	Decorative materials or adds-on
Declared approval	For adults only	For adults or children
Seller	Authorized, consistent prices and items over time, email address connected to the website as primary contact,	Previously trading different items (ie, trendy items), price fluctuations, hidden contacts or free email as primary contact, blank pages, broken links or errors in the website.

FFR, filtering facepiece respirators.