PART# HP54130V ANSI/ISEA Z89.1-2014 (R2019) Type I, Class C CSA Z94.1-2015 (R2024) Type I, Class C ABS material. Low-profile design. Rear padded suspension. 4- position harness points. Replaceable sweat band. Vented pressure pad. Universal accessory slots. Passes high temperature. Passes low temperature. Easy to grasp knob and adjusts the suspension from 6.5 to 8. Swinging hinge points. Vented have universal accessory slots Vented meet Class C.