When it comes to being a flight attendant, there are certain rules that they must adhere to, especially regarding their appearance, which may include guidelines on clothes, hair, and even nails. For example, Delta Airlines requires their flight attendants to keep their nails trimmed and wear certain nail polish colors, like pink and red.

Delta Airlines is looking for flight attendants to help staff the friendly skies, but applicants seem to be struggling in the dress code department.

Related: Popular Vacation Airline Fined Over Female Flight Attendant Dress Code. While rules for being a flight attendant have since loosened up dramatically, airlines still hold

According to the New York Post, Delta recently shared its appearance requirement memo, which explains the expectations of the flight attendant role.

Delta Airlines' website crashed after opening the flight attendant job applications for the first time in over a year.

Delta reminded flight attendant hopefuls to wear adequate undergarments to any of its assessments in a leaked memo.

Delta Flight attendants spend the most time with our customers and are the face of our airline. They must be passionate about enhancing each customer's experience while embodyin

The memo also covers a range of appearance-related guidelines, including grooming, hair, jewelry, and clothing standards. It emphasizes that these requirements, though inclusive, are part of the airline's longstanding tradition.

The document gave specific details on how they should look when interviewing in person, saying that "proper undergarments must be worn but must not be visible."

Delta Airlines has issued a memo detailing the appearance of the candidates applying for the post of flight attendants. Wearing an underwear is a must but it should not be visible. Too long eyelashes are a strict no-no for the appearance of the flight attendants.