Barong tagalog is a formal shirt usually made of sheer lightweight but stiff fabric known as "nipis" (usually woven from piña or abacá fibers). When using sheer fabrics, it is worn over an undershirt known as the "camisón" or "camiseta", which can have short or long sleeves. The term "camisa de chino" is also used for collar-less and cuff-less shirts, named after its resemblance to shirts worn by Chinese laborers. It is worn with belted trousers and dress shoes. Headgear, when worn, is either a salakot or a buntal hat (and historically also top hats or bowler hats). The ensemble mixes elements of both native and Spanish traditions.