ABS material, this thermoplastic resin is a lightweight material that combines strength and rigidity. Low profile design offers a low center of gravity for better balance. 4 point ratchet suspension. Easy to grasp knob adjusts the suspension from 6 1/2 to 8 hat sizes. Rear padded suspension provides additional level of comfort on the wearers' neck. Replaceable sweat band with padded fabric and polyurethane foam. Vented pressure pad keeps the straps in place providing an additional level of comfort. Meets ANSI Z89.1 Class E, G, and C. 4-position harness points allows you to move the harness forward, backward, up or down. Allowing for the most optimal position for ultimate comfort.