For on-the-job protection you can trust, Jackson Safety SC-6 Hard Hats are a great choice. They meet ANSI Z89.1 - 2009 standards for impact (as well as Class C, G and E) and have a smooth dome design with no crevices. They have a four-point ratchet suspension and adjust to fit heads from sizes 6.5 to 8. They are comfortable to wear, even for long periods of time, since they are molded from dielectric HDPE (high density polyethylene). When you need to protect yourself and your employees against potential head hazards, Jackson Safety SC-6 Hard Hats are a smart choice.