Oakley Hstn Metal sunglasses combine a modern round silhouette with Oakley's Prizm lens performance. Designed for everyday wear, they deliver contrast-enhancing optics and secure fit for outdoor activities. Key attributes: Transparent Crystal Blue | BiO-Matter | Prizm lens technology for enhanced color and contrast | Polycarbonate lenses for impact resistance and clarity | UV protection | Unobtainium nosepads for no-slip grip | Prescription ready | Round lenses | Single bridge | Full rim | Wire trigger metal stem | Dimensions & fit: Lens width: 52 mm | Bridge: 21 mm | Temple: 137 mm | Lens height: 48 mm | Regular fit | High bridge fit | Composition & care: BiO-Matter frame | Polycarbonate lenses | Metal temples | Unobtainium nosepads | Clean lenses with mild soap and water and dry with a microfiber cloth; avoid abrasive cleaners and solvents.