Spy Optics Logan Sunglasses % Visible Light Trans. Cat. Tint Base 15% 3 Grey Green SPY+’s Happy™ Lens is the foundational technology the brand offers across all its sunglass lenses, but it’s far from basic. Happy™ is SPY+’s proprietary technology designed to not just protect eyes but also boost mood and alertness by harnessing the beneficial aspects of long-wave blue light. Spy+ Happy™ Lens is available in polarized as well as non-polarized options in a multitude of tints and mirror options.