Oakley Shackle Sunglasses pair Oakley performance with a squared, everyday design. The Shackle stands out for its lightweight O Matter frame and Prizm Sapphire lenses that enhance contrast in varied light. Key attributes: Black | O Matter | Prizm lens technology for contrast enhancement | Lightweight, durable frame | Adjustable wire-core temples | Unobtainium earsocks for a secure fit | Includes protective case and microfiber cloth | Square frame shape | Matte finish | Prizm Sapphire mirror lenses | Dimensions & fit: Frame dimensions: 52-18-137 mm | Lens size: 52 mm | Bridge: 18 mm | Temple length: 137 mm | Lens height: 46 mm | Large fit | Composition & care: Frame: O Matter | Lenses: Polycarbonate | Earsocks: Unobtainium | Wipe lenses with a microfiber cloth and store in the included protective case.