As its name suggests, Revo designed the Polarized Crux N Sunglasses for rock climbing, which means that it's tough enough for nearly every sport out there. Their impact resistant Serilium lenses stand against pebbles and falls without a scratch while Revo's High Contrast Polarization filters out any glares to leave you with natural, clear, and comfortable eyesight. The Element Shed and anti reflective coatings keep water, dirt, oil, and nasty reflections off these high performance lenses. Revo made its proprietary Eco Use frame partially out of castor beans in order to make it more flexible without harming the environment, and the frame's open edge design reduces weight and enhances comfort whether you're on the wall, the trail, or in town. Motion Fit technology ensures this pair positions itself to ideal locations on your ears and nose, and temple pads make sure these sunglasses don't slip off your face when you work up a sweat. Revo included a detachable leash that acts as a buoy in case you drop the Crux in the water.