More than any other item of clothing, the hat yields gracefully to mismatching.
Wearing a bespoke suit? Pair it with a beanie. Sporting a hoodie? A flat cap is just the ticket. Any of these eclectic Northwest selections would look right at home with an array of formal and informal outfits. Then again, remain alert; get the mix wrong and people will stare as if a melon sits atop your noggin.