mixed case includes:hp44116 (4), hp44117 (4), hp44118 (4) and hp44119 (4) abs material- strong, yet ultra-light for seemingly weightless protection low profile design- offers a low center of gravity for better balance rear padded suspension- provides additional level of comfort on the wearers’ neck 4-position harness points- allows you to move the harness forward, backward, up or down allowing for the most optimal position for ultimate comfort replaceable sweat band- padded fabric and polyurethane foam for all day wear vented pressure pad- keeps the straps in place providing an additional level of comfort easy to grasp knob- adjusts the suspension from 6-1/2 to 8 swinging hinge points- allows you to find the most comfortable position on the back of your head