In-N-Out Burger bans employees in 5 states from wearing masks

In-N-Out is barring employees in five states from wearing masks unless they have a doctor's note, according to internal company emails leaked on social media last week. An In-N-Out Burger signs is seen on June 8, 2010, in Baldwin Park, Calif. (Adam Lau/AP)

In-N-Out Burger, a popular fast food chain, will soon ban its employees in five states from wearing masks, emphasizing the "importance of customer service," according to a new policy.

Starting Aug. 14, In-N-Out employees in those states who want to wear a mask must have a valid medical note "exempting him or her from this requirement," a company memo says. Those who wear masks for medical reasons must wear a company-provided N95 mask, it says.