This Ian Somerhalder and Nina Dobrev photo contains
fedora, felt hat, homburg, stetson, trilby, boater, leghorn, panama, panama hat, sailor, skimmer, straw hat, hip boot, and thigh boot.
There might also be
outerwear, overclothes, pith hat, pith helmet, sun helmet, topee, topi, well dressed person, suit, pants suit, and pantsuit.