Introducing the Monolith 50/50 Matte Black Frame with Happy Lenses by Spy+. These shades were designed with your daily outdoor activities in mind. The Happy Lenses are scientifically tuned to improve your mood and alertness while providing enhanced color and contrast. The lenses are also tapered to follow the natural curvature of your eye for a distortion-free experience. In addition, the Monolith 50/50 comes with a Scoop ventilation system to increase airflow and prevent fogging caused by sweat and moisture. The frame is also lightweight and flexible for all-day wear. With 100% UV protection, you can enjoy the outdoors worry-free.