These shoes are made using the Bolognese construction method. Internal Structure: In this method, the upper (the outer part of the shoe) is folded inward and then glued or sewn to the sole. Flexibility: Because the upper is directly attached to the sole, the shoes offer a very flexible feel. Lightweight: Compared to many other construction methods, Bolognese construction results in relatively lightweight shoes. Integration: The close connection between the upper and the sole creates a high degree of integration, providing a good fit to the foot. These shoes have been worn once and are in good condition, but please understand that they are used items before purchasing.