The vents are a very important feature of a helmet, as it allows airflow through the helmet. A good rule of thumb is that a helmet should allow at least ten ventilation slots. The larger the number of vents, the better the airflow and the more comfortable the helmet.
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The vents are a very important feature of a helmet, as it allows airflow through the helmet. A good rule of thumb is that a helmet should allow at least ten ventilation slots. The larger the number of vents, the better the airflow and the more comfortable the helmet.