A Taiwanese model has sparked safety concerns over her habit of posing in her bra while flying business class.

Shocking footage recorded by online personality Yumi Faluntin shows her sitting in the large chair with her nipples exposed through her lingerie.

In one video, wearing just a white bra, she repeatedly adjusts the seatbelt between her cleavage. In another, she pouts and flaunts her bosom while an unaware passenger scrolls on his phone to her left.

While on a long-haul flight on a Boeing 777, Yumi disrobes mid-air to show off her stockings and suspenders.

Videos of the provocative behaviour have helped her earnings from social media but drawn criticism from some safety-conscious viewers who said it was inappropriate behaviour for flights.

The seemingly lewd behaviour also breaks the dress codes of several airlines and could also be prosecutable under local laws.

One follower said: 'Why do you have to show your breasts? The cabin crew could be distracted.'

Another added: 'Please wait until you reach the privacy of your hotel room. If I were in a seat nearby, I would feel very uncomfortable with someone doing this.'

Wearing revealing clothing on a plane is generally discouraged for reasons of safety and decorum.

While international aviation law does not explicitly dictate dress codes, most airlines enforce their policies requiring passengers to wear attire that does not cause discomfort or offence.

Nudity or overly revealing clothing may also violate local laws or airline regulations and could result in fines, denied boarding, or removal from the flight.

Many airlines, including American and Delta, do not have specific dress code rules but require passengers to 'dress appropriately' and prohibit offensive clothing.

Spirit Airlines' updated policy explicitly prohibits clothing that is 'see-through', 'inadequately covered', or exposes private parts.

Hawaiian Airlines also details prohibited attire, including bikini bottoms, Speedos, bare feet, and clothing that is 'lewd, obscene, or patently offensive to others'.