The Mizuno Cushionrevo Diamond Jr is designed for young athletes who demand comfort and performance. Solid Rubber Outsole: Complete solid rubber outsole for 360 degree grip. GROUND GRIP: Multi stud outsole for superior grip and traction for all types of fields. Printed RUNBIRDA(R) Logo Technical Synthetic Upper: Soft and durable synthetic leather that meets the demands of the modern game. MIZUNO ENERZY (FOAM): Provides amazing cushioning and energy return.