The California-based fast food chain In-N-Out Burger announced this week that employees in five states will be prohibited from wearing masks while working without a medical note, the Los Angeles Times reports.

“We are introducing new mask guidelines that emphasize the importance of customer service and the ability to show our Associates’ smiles and other facial features while considering the health and well-being of all individuals,” read a memo sent by the company to workers in Arizona, Colorado, Nevada, Texas, and Utah.

[Exceptions will be made for employees with specific medical need for masks, but … what would those be? Presumably that would only potentially benefit the immune suppressed, but even that’s pretty questionable, given how such masks trap pathogens under extended use. The headline refers to the jingle used by the company for years; in case some are unfamiliar with it, see below — Ed]