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Professional hard hats help protect the wearer by absorbing impact energy. Over time, the sun's UV rays can cause a hard hat shell to become brittle and compromise its ability to protect the wearer. With the 3M H-800 Series Hard Hat with Uvicator Sensor, you'll know when it's time to replace a hard hat due to extended UV exposure. The sensor changes color from red (new status) to white (replace status) as the hard hat is exposed to UV light, alerting the wearer that it's time for a replacement. Smooth, easy turning 4-point ratchet suspension. Suspension sits lower on head to reduce pressure and increase security. Available in range of colors. Suggested applications: transportation, construction, military maintenance, repair and operation, mining, metal fabrication, oil & gas, general manufacturing. Meets requirements of ANSI/ISEA Z89.1-2009 Type 1, Class C, G and E.