Retrospec Zephyr A fully formed ABS outer shell with high quality EPS foam ensures safety on impact, so you can confidently carve the mountain on your skis or snowboard. Breathable Design Zephyr has 9 vents for ultimate temperature regulation, and our glove-friendly BreezeBar allows you to customize the airflow in your helmet whenever you need to. Adjustable Fit Helmet sizing is adjustable with an ErgoKnob dial that allows you to quickly dial in the most comfortable, snug fit for your head. Removable, Washable Earmuffs After things get sweaty on the slopes, you can easily remove and wash your helmet’s earmuffs (Hand wash only), or leave them out for a breezier descent. Sizing To determine the correct helmet size, wrap a measuring tape around your head. The tape should rest just above your ears and remain level around the circumference of your head. M 55-58 cm Brand New in Box