PETZL - Vizir, Protective Eye Shield SHIELD YOUR EYES: This VIZIR ensures that your eyes are fully protected. PERFECT ADDITION: Mounting inserts for easy installation on VERTEX (2011 version and later) and ALVEO helmets. WEATHERS ALL CONDITIONS: The VIZIR is scratch- and fog-resistant EASY TO ADJUST: Pivots quickly from work position to storage position on top of the helmet. LIGHTWEIGHT: Only weighs 65 grams, the shield rests on top of your helmet when finished using.