Oakley HSTN Sunglasses combine a modernized round silhouette with Prizm lens technology to enhance color and contrast. Designed for everyday wear and active use, they pair a lightweight frame with no-slip nosepads for reliable retention. Key attributes: Black | Nero | BiO-Matter | Prizm lens technology enhances color and contrast | Improved retention when wet | Durable frame for everyday use | Prescription-ready | No-slip Unobtainium nosepads | Lightweight construction | Modernized circular lenses (round silhouette) | Trigger stem inspired by Oakley Razor Blade | Full-rim matte finish | Dimensions & fit: Lens width 52 mm | Bridge 21 mm | Temple 142 mm | Size M (131 mm) | Composition & care: BiO-Matter (frame) | Unobtainium (nosepads) | Prizm Jade lens | Clean lenses with mild soap and water and dry with a microfiber cloth. Avoid abrasive cleaners and solvents.