This Ben Foster photo contains
fedora, felt hat, homburg, stetson, trilby, porkpie, porkpie hat, boater, leghorn, panama, panama hat, sailor, skimmer, and straw hat.
There might also be
dress hat, high hat, opera hat, silk hat, stovepipe, top hat, topper, beaver, beaver, castor, well dressed person, suit, pants suit, and pantsuit.