Welcome to the dark side. The ULTRA Black lens has the tint (VLT) cranked down to 6%, compared to industry standards of 11%. These lenses are DARKER and legally should not be used when operating a vehicle. On the other hand, these are the ultimate bright outdoor lens. Whether you are on the snow, sand, a white rooftop or just want the ultimate poolside shark lurking lens these are for you. The Rayth is a welcome addition to the performance line. They feature an ultra-bold shape with sharp lines and a premium fit. The Rayth is a standard-width frame, made compact top to bottom and uses a flat profile lens which results in a sledgehammer tough look. The details on the Rayth are second to none and it is sure to become your new go-to power adder when it comes to eyewear. Other Rayth features include a modified arm with rubber inserts to prevent wear and hair snags. Furthermore, the Rayth features increased surface area in the rubber nose for more grip on the face. Standard Performance line features include 2mm thick lenses that meet ANSI Z.87 mass impact requirements plus a specific arm, with beveled emblems with Rubberized Hytrel® inserts in the arms and nose. The Quick-Latch side-shield system provides lateral protection from debris and unwanted side light meeting ANSI Z87+ standards with side shields installed. Standard Performance line features include 2mm thick lenses that meet ANSI Z.87 mass impact requirements plus a specific arm, with beveled emblems with Rubberized Hytrel® inserts in the arms and nose. The Quick-Latch side-shield system provides lateral protection from debris and unwanted side light meeting ANSI Z87+ standards with side shields installed. Lens Technology: 2mm thick Polycarbonate lens meets or exceeds mass impact requirements for Z87 standards, injection molded to the highest standards and tested to ensure optimal clarity, along with color and light transmission standards. Lenses are U6:L3 UV400 - 100% UVA / UVB blocking Ultra Black Lens VLT = 6% / Cat 4Ultra Black Polarized Lens VLT = 6% / Cat 4