The C91 helmet will offer riders some of the best features on the market at a budget-friendly price. Starting with the Advance Polycarbonate Composite Shell. It provides a lightweight helmet with a superior fit and comfort using advanced CAD technology. The chin bar operates with an easy to use a single lever and is user friendly with gloves. It also includes an internal sun shield with a manual mechanism that moves forward and back with ease. The large top vent allows airflow ventilation throughout the deep EPS channels of the helmet, keeping you cool on rides. DOT. Approved and Meets FMVSS 218 Standard.