ABS material is strong, yet ultra-light for seemingly weightless protection. Low profile design offers a low center of gravity for better balance. Swinging hinge points allow you to find the most comfortable position on the back of your head. Rear padded suspension provides additional level of comfort on the wearers' neck. Replaceable sweat band with padded fabric and polyurethane foam. Universal accessory slots fit cap mounted earmuff and accessories. Pass reverse orientation, high temperature and low temperature. Ridgeline vented cap style hard hats are rated Class C and do not meet Class E or G safety standards for industrial head protection. 4-position harness points allows you to move the harness forward, backward, up or down. Allowing for the most optional position for ultimate comfort. Replaceable ratchet suspensions available.