The guayabera (/ɡwaɪ.əˈbɛrə/), also known as camisa de Yucatán (Yucatán shirt), is a men's summer shirt, worn outside the trousers, distinguished by two columns of closely sewn pleats running the length of the front and back of the shirt. Typically made of linen, silk, or cotton, and appropriate for hot and/or humid weather, guayaberas are popular in Mexico, Central America, the Caribbean (especially Cuba, the Dominican Republic, Haiti, Jamaica, and Puerto Rico), South America, Southeast Asia, the south of Spain, and Portugal.