Linus is preppy

For Father's Day Linus was wearing a new onesie with polo shirt top. Because he is so preppy he turned up his collar to be cool like the other kids.

I remember when having the collar turned up on a polo shirt was cool and preppy, then it wasn't, now I think it is cool again. Or one could follow the other interpretation where various factions have their collars tuned up or down based on complicated rules of fashion and cliques.

Are upturned collars cool again?