BELLUS is the first model to adapt HJC's SLID technology, which minimizes rotational impact on the brain in the event of a crash. With the integration between the latest design and technology, the BELLUS will appeal to a wider range of customers who will be satisfied.HJC bicycle helmets are designed and engineered to have the lowest weight possible. Density, placement, shapes and materials all play a part in optimizing weight. HJC helmets are tested both in the lab and in real-world use to meet the highest quality standards. HJC is one of the few helmet companies that are equipped with their own state-of-the-art wind tunnel lab for testing aerodynamics, ventilation, noise and other parameters. HJC's wind tunnel test lab measures air forces in a variety of riding conditions to improve helmet performance. HELMET FEATURES:SELFIT - an automatic self-adjusting system that represents a revolutionary technology in bike helmet fitting. Once the helmet is adjusted to your head, it requires no further adjustments, even if your head moves while riding. The SELFIT system automatically adjusts the gap and ensures a consistent fit and comfort for your head. Five snap fitting positions ensure a consistent fit and comfort for all different types of head shapes and sizes. The rider can precisely adjust the fit, resulting in a helmet that will be perfectly tailored for a perfect ride every time.COOLPATH - A new technology replacing the inner padding that allows cool air to flow around the head and increase comfort during the ride. The cool airflow and lightness of the helmet improve fit and provide an excellent riding experience. A certain amount of air passes through the front intake, then circulates inside the helmet and finally exits through the exhaust port. This increases internal airflow to cool the head and dissipate heat.SLID - HJC developed the safety feature by adding a special GEL material. The SLID is placed in the interior of the helmet to reduce the amount of energy delivered to the brain by providing a rotational function. The advanced GEL material inside the SLID liner has flow properties. As a result, minimal impact forces and energy delivered to the brain can be dissipated by dissipating the impact.