More than "just a helmet," the Mission looks good and is incredibly comfortable – so much that you might even forget you're wearing it. Its light weight combines with a fit system that offers next-level comfort and fit. Open the vents to cool off on warm spring days, then close them to stay warm if the weather turns and snow starts to blow. Lightweight in-mould construction with a polycarbonate shell and an EPS inner. Aerocore construction featuring Koroyd is designed to absorb more impact than traditional helmets. AirEvac2 system drives warm air away from your goggles and adjusts by folding or unfolding liner flaps. Adjustable dial-fit system. Removable Snapfit SL earpads are machine washable and work with Outdoor Technology audio systems. Low-profile regulator adjusts internal airflow from the 14 vents.