If you think that the Full90 or other headgear is seen as a "fashion statement", then you obviously don't have a teenage girl!
My daughter has agreed to wear one this season after a nasty concussion last year. She's not thrilled about it, but has accepted it.
Confession: You are correct, I don't have a teenage girl.
I guess what I was getting at was that once headgear use reaches a certain 'level', the fashion imperative will kick-in. Cut & color are going to be as important as functionality.
Hope your daughter doesn't have continuing problems with concussions. My experience from football is that successive concussions come easier after you've had that first one. After a while, no headgear is going to help.