Pith helmet

A pith helmet was a headgear used to protect from the sunlight on tropical parts such as Africa and southern Asia.

A pith helmet was seen in the wardrobe when the Tenth Doctor chose his outfit. (TV: The Christmas Invasion)

Iris Wildthyme wore a pith helmet and goggles when she, Panda, Simon, and Barbra first ventured out into the jungle on Valcea. (PROSE: Enter Wildthyme)

Godascre and his soldiers wore pith helmets. (TV: Empress of Mars)

K9 Mark III wore a pith helmet on Egypt. (COMIC: City of Devils)