Welcome to the dark side. This dark ultra violet 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 future of high-speed performance: Aggressive, loud and innovative beyond any pair of sunglasses before them. The Future Tech incorporates a multitude of cutting-edge features that compliments its overall futuristic design that enables them to stand on their own in the performance and safety category. Features include 2mm thick lenses, with side shield protection for a package that meets Z87+ standards out of the box. Hytrel® touch points on the nose and arms allow for a comfortable all-day fit that grips and stays in place. Lens Technology: 1.9mm thick Polycarbonate lens that 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. We use only the highest quality polarizing filters on our lenses for optimal glare reduction and supreme clarity *Available in both non-polarized and polarized options* Lenses are U6:L3 UV400 - 100% UVA / UVB blocking Dark Ultra Violet Lens VLT = 6% / Cat 4Dark Violet Lens VLT = 6% / Cat 4