Sou'wester
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A sou'wester is a hat made of flexible waterproof materials worn to repel water, often with a neckstrap to keep it from flying off in strong winds. It was traditionally worn by sailors off the North Atlantic coast of the U.S. and Canada, and is distinguished by a wide brim that becomes especially long in the back for the purpose of protecting the neck from the elements.
The traditional North American firefighter helmet, which also sports a wide brim and a long tail covering the back of the neck, can be seen as a hard version of a sou'wester.