The off-road world is a dirty, tough place. Chunks of rock and dirt mean business when launched by roosting tires, and even when it s muddy, hitting the ground is always hard. That s why Bell sweated the details on the MX-9, loading it with a tough polycarbonate shell, MIPS energy management system, an adjustable visor, Velocity Flow ventilation, and a removable, washable, anti-microbial liner for when the time comes to hose down. The MX-9 MIPS packs all these features into one helmet, delivering exceptional value and pro-caliber performance. When a head rotates quickly and comes to a sudden stop, the rotational acceleration can cause the brain tissue to experience high levels of strain. The stretching of the issue that can be caused by these motions can result in various types of brain injury. BELL believes, that helmets equipped with MIPS technology can provide an additional measure of protection in certain impacts. MIPS uses a slip-plane system that moves inside the helmet, mimicking the brain’s own protection system. This layer is designed to rotate inside the helmet with the intent to potentially slow or reduce the amount of energy transferred to or from the head. Velocity Flow Ventilation Bell s Velocity Flow Ventilation System literally pulls air through the helmet, keeping the rider cooler. Flying Bridge Visor Not all visors are created equal. The Flying Bridge Visor design allows more flexibility and improves airflow across the helmet. By not using a traditional center post and screw concept, BELL was able to increase the amount of energy management material in a high impact zone.