A hat is a covering which is worn for various reasons. The protection against the elements and ceremonial reasons, and university graduation. religious reasons, safety, or as a fashion accessories. In the past, hats were an indicator of social status. In the military hats may denote nationality, branch of service, rank, and/or regiment. Police wear distinctive hats peaked caps or brimmed hats, much as those worn by Police. Some hats have a protective function. the hard hat protects construction workers' heads from injury. British Police Custodian helmet protects the officer's head. It shades the face and shoulders from the sun. A cowboy hat protects against sun and rain and fur hat with fold-down earflaps keeps ears warm. Some hats is for ceremonial purposes, such as the university graduation ceremonies. Chefs also wear hat. Some hats have religious functions, such as the Bishops and the turban worn by others.