Pyramex Ridgeline Hard hats are constructed with ABS material to provide a strong hat with a lightweight fit. The ratchet suspension is easy to adjust which allows you to modify the fit while wearing the hat. The sweatband is made of padded fabric and polyurethane foam and can be replaced. The Ridgeline hard hats passes HT high temperature and LT low temperature ratings. The hi vis colors available have been tested for the HV marking.