Wiktionary
akubra
n. (context Australia English) A brand of Australian hat, especially a broad-brimmed model similar to a fedora, traditionally worn by Australian stockmen. Also used attributively. (from 20th c.)
Wikipedia
Akubra
Akubra is an Australian hat manufacturer. The company is popularly associated with bush hats made of rabbit fur felt with wide brims that are worn in rural Australia. The term 'Akubra' is sometimes used to refer to any hat of this kind, however the company manufactures a wide range of hat styles including Fedora, Homburg, Bowler, Pork pie, Trilby.
The name is believed to be derived from an Aboriginal word for head covering.