Anti-brouillard. Lentille plastique qui absorbe l'humidité. Lentille silicone qui assure une couche isolante entre le pinlock et l'écran. The pins between the lens and the visor are eccentric, so that the axxis of the pin is not exactly in the center. In sur a way, you can increase or decrease the tension on the pinlock lens turning insert pins and therefore perfectly adjust the lense to your visor. https://www.youtube.com/watch?v=TZgz1YGFiKw