Optic Pinlock Ins Protec TINTPINLOCK VARIANT PRECISION OPTICS INSERT LENS ALL Clear and Dark Smoke Lenses The Pinlock visor insert is made out of a material that contains moisture absorbing properties, which reacts like a sponge and absorbs moisture effectively. The inner part of the Pinlock is lined with a silicon bead, which creates a double glazed window type of effect when the Pinlock visor insert is attached to the helmet visor. The pocket of air that is trapped in between