This Jackie and Kelso photo contains
fedora, chapeau de feutre, homburg, stetson, trilby, hombourg, chapeau de feutre trilby, and concert.
There might also be
plaisancier, leghorn, panama, marin, skimmer, chapeau de paille, barbeau, chapeau, écumoire, paille, canotier, livourne, chapeau panama, and sailor.