TIL Ethnically Thai women in Vietnam wear motorcycle helmets specifically adapted for their traditional hairstyle.

https://www.care.org/news-and-stories/news/the-motorcycle-the-high-bun-and-the-best-cup-of-coffee-in-vietnam/

https://www.reddit.com/r/todayilearned/comments/1517r75/til_ethnically_thai_women_in_vietnam_wear/