Description: Whether you're golfing, mountain biking or pounding pavement on a training run at dawn, you can't maintain peak performance unless your eyes keep up with your environment. That's why we partnered with Transitions Optical to create lenses that darken and lighten automatically. They help you adapt to changing light conditions while filtering out 100% of ultraviolet light (UV). Not to mention the added confidence of having lenses that aren't too dark when the sun pulls a disappearing act, or too light when it knifes through the clouds.