While there are only two recognized classifications of protective helmets that meet ANSI requirements, there are multiple considerations to take into account when choosing a hard hat that is right for the job.
Know the hazards - What is the environment? What is the working doing? What are the risks?
Meet the right safety standard - Does your helmet comply with applicable requirements and standards?
Provide the right accessories - Do you need eye, face, and hearing protection?
Emphasis on fit and feel - Is the hard hat comfortable enough to wear all day?