Arai Vx-pro4 Van Beveren HelmetA smooth instead of ridged shell The shell itself is consistently round and smooth, maintaining the Glancing Off shape concept in areas above the acknowledged test line and influencing those below the test line. Here, the rounded chin bar maintains the same compact shell length as the previous model, the VX Pro3. The result is less protrusion, which may be less likely to catch and dig in during a spill. Shell material In order to maximize performance,