Oakley Sielo Sunglasses pair Oakley’s Prizm lens technology with a mixed-material frame for enhanced color, contrast and all-day comfort. Key attributes: Purple | Violet | BiO-Matter | Prizm lens technology for enhanced color and contrast | Polarized lens option | Lightweight and durable construction | Unobtainium nosepads for no-slip grip | Three-point fit | Soft-touch earsocks and propionate temple tips | Round shape | Full rim | Single bridge | Mixed-material frame front and metal temples | Dimensions & fit: Lens width: 57 mm | Bridge: 17 mm | Temple length: 143 mm | Regular fit | Composition & care: Clean lenses with the supplied Microclear bag. Hand wash and air-dry the cleaning bag and avoid abrasive cleaners on lenses.