The 3M SecureFit H-Series Hard Hats with Pressure Diffusion Technology are designed to self-adjust to the wearer as the ratchet is tightened. This helps create a personalized fit and reduces the pressure on the forehead up to 30% compared to current 3M H-series hard hat suspensions. The smooth, easy turning ratchet suspension sits lows on the head to increase security and reduce pressure, helping to make the SecureFit H-Series a comfortable and stable hard hat option. UVicator sensor on the back of the hat lets wearers know when to replace hard hat due to UV exposure. Meets ANSI Z87.1 standards and CSA Z94.1 Type 1, Class G and E requirement.