'shadower'; Spanish: [somˈbɾeɾo]) is a type of wide-brimmed Mexican men's hat used to shield the face and eyes from the sun.

It usually has a high, pointed crown; an extra-wide brim (broad enough to cast a shadow over the head, neck, and shoulders of the wearer) that is slightly upturned at the edge; and a chin strap to hold it in place.

The concept of a broad-brimmed hat with a high crown, for wear by riders on horseback, can be seen as far back as the Mongolian horsemen of the 13th century.

Hot and sunny climates inspire such tall-crowned, wide-brimmed designs,[3]: 10  and hats with one or both of these features have evolved again and again in history and across cultures, as, for example, the Greek petasos of two millennia ago, or the traditional conical hat widespread in different regions of Asia.

The Mexican variation of the sombrero added an even wider brim and a high, conical crown.