this Class is intended to provide workers with protection against impact and penetration. This headwear is non-conducting and must pass the 20,000 V dielectric-strength test specified for Class E headwear. Although this class of protective headwear is manufactured from high grade non-conducting material, it must never be used as a primary barrier in a protective system designed to prevent contact with live electrical apparatus. This headwear provides improved protection against electric shock following accidental contact between the headwear and exposed energized electrical sources.