Why do Malaysian men wear black hats? Is this their etiquette?

Not all Malaysian men wear black hats. There are Malays and Chinese in Malaysia. There are Indians, only Malays wear black hats. This is the custom and traditional etiquette of Malays, and it is also the official etiquette hat of Malaysia. Generally, non-Malays wear black hats when attending official activities. This black hat is called "Songgu" in Malay.