The Serengeti Dante flex is uniquely fashioned temples distinguish you from the crowd. Wire-flex technology automatically adapts for an impeccable fit. All Serengeti lenses offer the latest in photochromic technology, which constantly lightens and darkens throughout the day to ensure you see every detail. Designed to bend to the contours of your face, Wire-Flex features a flexible and strong blend of nickel, silver and stainless steel. The result is a comfortable fit that feels truly customized.