You do not have to wear a hat when you visit Australia. Some people choose to wear a hat based on the type of climate Australia is.
J.J. Hat Center
He wore a bowler hat.
A tricorn hat.
green and white striped bucket hat
Fidora
A totaly beastie hat. Yo, dog
He wore a Bowler hat.
he wears a black lever jacket
It's a tugboat captain hat.
The Buddha doesn't wear a hat since he is a monk, who dresses himself with just robes.
Levi's 569