Tijuana Toppers is a term used to describe the traditional Mexican sombrero hats that are popular in the city of Tijuana. These hats are typically made from straw and feature a wide brim and a conical crown. They are often decorated with colorful ribbons, feathers, and other embellishments. The term 'Tijuana Toppers' is used to refer to these unique hats, which are a symbol of Mexican culture and heritage.