The adidas Performance Children Running Shoe response boost techfit has an elastic extension is a natural walking motion to ensure while the Upper individually adjust each foot. The TORISON ® SYSTEM provides also for an optimal rolling of rear and front shoe. - With lacing for optimal grip with neonfarbenden elements padded lining for maximum comfort energy-retracting boost midsole robust sole Upper: Other Materials Lining and Insole: Textile sole: other materials