Kaenon introduced polarized SR-91 as the answer to all of the shortcomings of existing polarized lenses. Glass is heavy and shatters, CR-39 is brittle and not impact-resistant, while polycarbonate offers a dull view and scratches easily. SR-91 was tested in independent labs and confirmed to be the only polarized lens that offers razor-sharp clarity, impact-resistance and glare-reduction all in one ultra-lightweight and durable lens. All of the good. None of the bad. But our testing doesn’t stop there. Kaenon’s SR-91 lens is constantly relied upon and then validated by the world’s top athletes and adventurers – and it always lives up to the task. Paired with Glare 86®, Kaenon’s exclusive and proprietary polarizing element, our lens technology reduces glare up to 99.9% and provides complete protection against all harmful UV rays.