By far one of the highest quality pair of shades I have ever owned. With the release of IVI they have spared no expense in ensuring each pair of shades has a strong attention to detail, an awesome fit, and the lenses are incredible. The lenses are produced by the legendary Carl Zeiss Vision. They specialize in everything optics and make everything from microscope lenses and camera lenses, so they really know what they are doing and quite simply the lenses are the the toughest I have ever had, with the highest optical clarity. Overall a great pair of shades well worth the price and come in clean and solid colorways. Also, with the power moves IVI has been making recently with the addition of Austyn Gillette and Keith Hufnagel to the team, you know IVI is headed in the right direction if guys like that are backing it.