These are hats from way back when there were bandits in Brazil. Cangaço is the name given to "social banditry" similar to "Robin Hood". They were mainly found in the North East of Brazil in the late 19th and early 20th centuries.
This region of Brazil is known for its aridness and hard way of life, and in a form of reaction against the domination of the land owners and the government, many men and women decided to become nomadic bandits, roaming the hinterlands seeking money, food and revenge.
If you want a good one made from leather then you will have to fork out quite a bit, or you could get a cheap one.
Brazil (Portuguese: Brasil Portuguese pronunciation: [bɾaˈziw]),[nt 1] officially the Federative Republic of Brazil (Portuguese: República Federativa do Brasil, listen (help·info)), is the largest country in both South America and Latin America. At 8.5 million square kilometers (3.2 million square miles) and with over 208 million people, Brazil is the world's fifth-largest country by area and the fifth most populous. The capital is Brasília, and the most populated city is São Paulo. The federation is composed of the union of the 26 states, the Federal District, and the 5,570 municipalities. It is the largest country to have Portuguese as an official language and the only one in the Americas; it is also one of the most multicultural and ethnically diverse nations, due to over a century of mass immigration from around the world.