Modern Geox J Xled shoes, made of textile and synthetic materials from the Respira series. Leather insole. The left shoe displays a set of light effects, while the right shoe connects via Bluetooth to a smartphone app (Android and iOS), allowing you to individually program the shoes by entering words or images into the display. A USB cable is included. The shoes feature Geox's patented perforated sole, which allows feet to breathe. Highly recommended!