Large field of vision and best fit for sport . The Oakley™ Hydra revolutionises the look of traditional sports eyewear.Inspired by the everyday life of urban cyclists, the close-fitting sunglasses create a distinctive and versatile look and protect against wind and weather. The Prizm™ lens technology ensures improved vision and, thus, ensures that active athletes get through the day fully motivated and safely.PRIZM™Prizm™ is a revolution in lens optics built on decades of colour science research. Prizm™ lenses offer unprecedented control over light transmission, allowing colours to be fine-tuned to maximise contrast and improve visibility.