While looking through the data from the skins API, I discovered what appears to be a text bug:
https://api.guildwars2.com/v1/skin_details.json?skin_id=145
The skin is for Light Armor Leggings, but the name is “Student Circlet”, which is a helm name. The name used for the items before the Feature Pack was “Student Pants”.
http://wiki.guildwars2.com/wiki/Student_Pants