Check out the patch notes for the v17 Precursor Update here: http://maplestory2.nexon.net/en/news/article/53778/precursor-update-v17

[Customization] Hair Length

CapturedRayneCapturedRayne
MapleStory 2 Rep: 1,910
Posts: 78
Member
in Suggestions and Feedback
Not sure if it's a bug or intended, but hair length still resets back to the default length when a character wears a hat.
Mintylicious