From my point of view, the Educand's Attire designs were heavily inspired by the traditional Japanese school uniforms, both male and female uniforms. Traditionally, it's the male uniform that comes with hat, while the female uniform comes with sailor style neck and tie, thus, when adopted into the Mog Station, the female/skirt version doesn't have the hat like the male/slacks version.

Quote Originally Posted by ElysiumDragon View Post
From what I've (vaguely) heard, the set was supposed to come with a red armband, but they nixed it because of possible contentious IRL associations.
That's a shame, I really love the armband version of the sailor uniform. In my opinion, 18usd for the in game costume set is quite a bit too much for my liking. While I do like the style of the skirt one for the sailor uniform, I think I might grab it during the sale.