Motocross hero The off-road world is a dirty, tough place. Boulders and dirt are not to be underestimated when fired from spinning tires, and even when it s muddy, the impact with the ground is always hard. That s why Bell has taken care of the details on the MX-9, packing a lot of features into a helmet that offers exceptional value and top-notch 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. Ionic+ Antimicrobial comfort padding The quick-drying inner padding helps dissipate sweat and uses silver to control odor. 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.