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 same options as standard ridgeline with the addition of air vents at top and rear of hardhat, which help to circulate air and keep the head cool and dry vented ridgeline hardhats meet class c, refer to attached product sheet for more details