What clothing piece do you think is so “American”?

Sometimes I’ll see non Americans (usually Europeans) joke about how you’ll know if someone is American when we dress a certain way. (Uggs, leggings, Birkenstocks, oversized sweaters??) What style or clothing items screams “American”?

Here’s an example of what I mean:

https://www.tiktok.com/t/ZTMhJuP64/