Definition - What does Hard Hats mean?
Hard hats are an article of personal protective equipment that is used to protect the head from falling objects or any other type of head trauma.
Safeopedia explains Hard Hats
Hard hats are an article of personal protective equipment that are worn by workers as a form of head protection. Hard hats are available in different types such as half brim hard hats, or full brim hard hats. The choice of the hats depends upon the nature of work and the types of hazards present. In some industries full brim hard hats are preferred as they give added protection from all sides.
Remember, if you seek further clarification on wear, care, and use for your specific type or model of hard hat, there is usually documentation available from the manufacturer. As legislation varies in each jurisdiction, you may want to defer to the manufacturer for clarification around care and use.