Our Dank Shades sunglasses have a sturdy Poly Carbonate frame to hold our shades together. Other materials that we use to put together our sunglasses include impact resistant UV 400 lenses which cover the face and make it enjoyable to wear. Our product is perfect for beach trips or an everyday walk as it draws attention from its beautiful mosaics! The metal hinges are very durable and the sunglasses are very well manufactured! Pick some up in the catalog today!