What is the role of ventilation in a helmet?

Ventilation in a helmet plays a critical role in keeping the head cool during use. When individuals engage in activities that require the use of a helmet, such as cycling, motorcycling, or construction work, they may exert themselves physically and generate heat. Adequate ventilation facilitates airflow within the helmet, helping to dissipate heat and moisture. This cooling effect is essential for maintaining comfort and preventing overheating, which can impair focus and performance.

While other factors like preventing fogging of the visor may also be considered, the primary purpose related to user comfort and safety is ensuring that the person wearing the helmet remains cool, especially during extended periods of wear or in warm conditions. This is particularly important in high-intensity scenarios where sustained attention and responsiveness are critical.