Oakley Sielo Sunglasses - Matte Black Ink Frame, Prizm Grey 。• WHEREVER YOU GO = The mixed material frame and seamlessly integrated performance features help cross this style from activities to daily life • LIGHTWEIGHT AND DURABLE - The BiO-Matter™ frame front and ultra-lightweight, C-5 metal temples provide durability and all-day comfort. BiO=-Matter is made from bio-materials having at least 56% bio-based carbon content (representing ratio of castor oil to fossil sources) • NO-SLIP GRIP - The Unobtainium® nosepads help provide retention with a no-slip grip and all-day comfort. Propionate temple tips provide additional retention and comfort • SEE MORE DETAILS - Available with Prizm™ lenses that are designed to enhance color, contrast so you can see more detail