Optic Nerve Vapor IC Multi Lens Sunglasses Exclusive Colors. Optic Nerve are master purveyors of high performance eyewear and their Vapor IC multi lens sunglasses, with colors found only at Nashbar, are a true treat for the eyes. Featuring a trio of easily interchangeable lenses, your eyes will have all the protection they need whether you're pedaling amidst the brightest light, overcast skies, or dead of night. Their frames are constructed of featherweight TR90 nylon so light you may forget you're wearing them while Tactilite rubber utilized at the nose piece and temple tips ensure the glasses stay exactly where you want them no matter how much sweat you generate. And what cyclist wouldn't appreciate the rimless lens design which delivers the broadest possible visual field perfect for keeping maximum awareness of your surroundings.