University attire in France?

As we begin preparing to send a child to college in August, it got me thinking about what parents do in France? I cannot imagine a French dorm room as being well-outfitted the way an American dorm room is. With beds on risers for extra storage. Rather, I suspect they adapt to the limitations in ways we don't. Most importantly, from what I've learned, no French student is going to classes in sweatshirts and pajama bottoms, they get dressed. Can't really imagine someone in Paris going out in sweats to get a baguette, so why would they go to classes like that? So, in my research, it would seem casual, but with style is the key to French university attire.