The rocker was created to protect the view near water. They provide 100% protection from UV rays, blocking light reflections and glare. They guarantee clear vision and contrast. Thanks to the wrh treatment (water repellent and hydrophobic) the lenses stay clean. The anti-reflective coating is appreciated while driving as it strongly reduces reflections from the asphalt and improves vision. Indispensable at the sea, on the beach, on a boat or when sailing.