Hat usually refers to a kind of headgear worn for protection from weather.The Elves knew hat-types they called Carab, Tôd or Táta, most likely referring to conical or phrygian cap style hats.Some Northmen wore similar headgear.The Hobbits also wore rather shapeless felt hats for weather protection.Gandalf wore a high, pointed and wide brimmed Pilgrim's Hat, Tom Bombadil wore a Tall Hat, both types of headgear typical for simple, travelling folk.