For classic American style with cutting-edge performance, reach for the Stetson Zylo-Flex 717 Eyeglasses from Stetson. To all appearances, these rugged frames are classic Stetson—strong and unassuming. But there’s more going on beneath the surface: Stetson crafts these frames in Zylo-Flex, a titanium-based memory metal that can be twisted or bent and will still return to its original shape. This strong and lightweight material offers durability and comfort to see you through all of life’s adventures.