For human-like people, the Federation provides four hats to match the agentsuniforms.
(1) a short-peaked helmet which protects the head and ears.
(2) a bowl-like helmet with a wide brim.
(3) a cloth cap with a peak, like a baseball cap.
(4) a thing like a cloth sun-hat, with a wide rim.
We sometimes wear (1), and we use (2) in very sunny places, but I’ve seldom seen anyone wearing (3) or (4).