The cowboy hat is a high-crowned, wide-brimmed hat best known as the defining piece of attire for the North American cowboy. Influenced by 19th century Mexican culture, today it is worn by many people, and is particularly associated with ranch workers in the western and southern United States, western Canada and northern Mexico, with country-western singers and ranchero singers in Mexico, and for participants in the North American rodeo circuit. It is recognized around the world as part of Old West lore. The shape of a cowboy hat's crown and brim are often modified by the wearer for fashion and to protect against weather.