Oakley Thurso Sunglasses combine a classic square silhouette with Oakley's lens technology to deliver clear, contrast-enhanced vision for everyday use. Key attributes: Black | O-Matter | Prizm lens technology for enhanced contrast | High Definition Optics (HDO) with 100% UV protection (up to 400nm) | Replaceable lenses | Lightweight, durable frame | Square frame | Subtle deco-line temple detail | Integrated nose bridge | Dimensions & fit: 54-19-145 | Composition & care: O-Matter | Prizm lens | Clean lenses with a Microclear or microfiber cloth and lens cleaner; store in a protective case; avoid abrasive cleaners and strong chemicals.