The SPY Monolith is truly out of this world. Employing SPYs HappyLenstechnology, these sunglasses are designed to boost your mood and alertness, while also enhancing colors and contrast around you. Additional 100% UV protection reduces eye fatigue and long-term sun damage. The ARC polycarbonate lenses are tapered to follow the natural curvature of an eye, and the snap pin hinges offer a secure and comfortable fit. Frame ventilationpreventsfog and moisture build-up, allowingyour vision tostaycompletely unimpeded.