When should a used helmet be evaluated for reuse?

A used helmet should always be evaluated for reuse after any significant impact or damage because helmets are designed to protect the head by absorbing impact energy. Even if the outer shell of the helmet appears intact, an internal compromise may occur that isn't visible. This could significantly reduce the helmet's effectiveness in future impacts. Evaluating a helmet after a significant impact ensures that it continues to meet safety standards and can adequately protect the wearer in the event of an accident.

This assessment is critical in maintaining safety protocols and adhering to industry standards which emphasize the necessity of inspecting protective gear after any known incidents. Keeping a helmet in use without this evaluation could lead to dangerous situations where the protection may not be sufficient for the user.