It is made out of Gynerium sagittatum known locally as caña flecha, a type of cane that grows in the region.
[1] The making of the hat originated amongst the Zenú tribes located in the Sinú river region, between the Córdoba and Sucre departments of Colombia.
First, the caña flecha leaves must be dried and the veins removed using a knife and a piece of leather to obtain uniform, sturdy strips.
After about three or four days in the mud, the colored strips are washed thoroughly with cold water and boiled in vija, another wild plant, for at least a couple of hours.
[citation needed] After the desired colors are obtained, the caña flecha strips are woven into the braids that are used to form the sombrero.
These hats are made in just three days, are loosely woven together, and use only 15 pairs of caña flecha strips to make the weave.
[citation needed] The Veintiuno uses 21 pairs of caña flecha strands per weave and is finer than the Quinciano and the Diecinueve.
[citation needed] Most of these handmade hats are produced by entire Zenú families located in the Departments of Cordoba and Sucre.