uvex ski snowboard visor glasses dial size adjustment wanted visor cm helmet, compatible, / 54-58

---------------------------------------------------------------------- A high level of safety is achieved through the combination of a shock-resistant outer shell and a shock-absorbing inner shell. Two shell sizes are available. You can adjust the head circumference to suit your head size using the dial on the back of the head. The opening/closing ventilation system allows you to adjust the temperature inside the helmet, which changes depending on the amount of exercise and climate. The visor has an anti-fog coating.