This Robert Pattinson photo contains
fedora, felt hat, homburg, stetson, trilby, dress hat, high hat, opera hat, silk hat, stovepipe, top hat, topper, beaver, boater, leghorn, panama, panama hat, sailor, skimmer, and straw hat.
There might also be
dress blues, dress whites, green beret, special forces, elite soldier, and regimentals.