For active days in the sun, you want an upgrade when it comes to UV eye potection. The lightweight waterproof sunglasses by CoolChange are suggested for those who are in need of a long lasting pair of shades to go with their active or athletic lifestyle. When you order, the shades will come in a resuable zipper case with a kit that includes interchangable replacement lenses, a cleaning towel, and a headband to keep them from falling off. 
Other features:
-Anti slip nose bridge
-Lenses with advanced UV protection
-Air vents at the frame of lenses to increase the speed of perspiration