HJC CS-MX 2 Solid HelmetHJC CS MX 2 Solid Helmet The HJC CS MX 2 is a no nonsense off road lid built for comfort, visibility, and ventilation. Its lightweight polycarbonate shell delivers a snug CAD designed fit, while the large eye port gives you a clear, wide view and works perfectly with goggles. The ACS ventilation system pushes cool air in and forces heat out, keeping you focused on the ride. Inside, the plush Nylex liner is soft, moisture friendly, and easy to wash.