Named after Colorado's Radium Hot Springs, the Zeal Radium Sunglasses are a great polarized option for rafting, kayaking, sailing, fishing, or just about any other activity that involves the possibility of glare. The polarized lenses will cut the glare out of your sunny morning commute, and allow you to see past the harsh river refraction while rowing down a whitewater section. The lenses block 100% of UVA/B and C light and allow you to see past the surface level of your favorite vistas and spots of interest (check out Yellowstone's hot pools!). Plus, they're reinforced with a hard coating that makes them resistant to scratches and everyday wear, so you can keep on using them for as long as you want.