This Castle & Beckett fan art contains
fedora, felt hat, homburg, stetson, trilby, sign, poster, text, chalkboard, boater, leghorn, panama, panama hat, sailor, skimmer, and straw hat.
There might also be
lunch, luncheon, tiffin, dejeuner, diner, pith hat, pith helmet, sun helmet, topee, and topi.