Serengeti Agata 8970 Sunglasses pair the brand's advanced mineral lens technology with an oversized butterfly frame for clear, comfortable driving and everyday wear. Key attributes: Shiny espresso | Brown | Nylon | Photochromic lenses | Polarized lenses | Mineral glass lenses | Lens category 2 to 3 (suitable for overcast to medium light) | Lightweight frame | Designed for driving | Oversized butterfly shape | Shiny finish | Dimensions & fit: Lens width: 57 mm | Bridge: 20 mm | Temple: 130 mm | Medium fit | Composition & care: Frame: Nylon | Lens: Mineral glass | Wipe lenses with a microfiber cloth; avoid abrasive cleaners and exposure to high heat.