All ST5 visor comes with Stilo's unique central locking position which allows the visor to be positioned in one of two positions, full lock and one that allows slight airflow while still allowing it to be locked in position. This component is located in the center of the helmet below the closing point of the visor for ease of use while driving. All ST5 visor comes with Stilo's unique central locking position which allows the visor to be positioned in one of two positions, full lock and one that allows slight airflow while still allowing it to be locked in position. This component is located in the center of the helmet below the closing point of the visor for ease of use while driving. All ST5 visor comes with Stilo's unique central locking position which allows the visor to be positioned in one of two positions, full lock and one that allows slight airflow while still allowing it to be locked in position. This component is located in the center of the helmet below the closing point of the visor for ease of use while driving. All ST5 visor comes with Stilo's unique central locking position which allows the visor to be positioned in one of two positions, full lock and one that allows slight airflow while still allowing it to be locked in position. This component is located in the center of the helmet below the closing point of the visor for ease of use while driving.