HIRACER Track & Field High-strength Hi silk technology lightweight and transparent upper The upper is made of Hales Hi silk, with a density lower than that of human hair. Through special weaving, it generates breathable small holes, making it more transparent, tougher and more durable. It features an internal support reinforcement structure that fits seamlessly, creating a technologically transparent upper. All-carbon fiber outsole with reinforcing ribs It is made of all carbon fiber materials and professionally calibrated. The full-palm reinforcing rib structure enhances the rigidity and torsional resistance of the carbon base, and provides the super-strong support and push required for sprinting. With dual carbon rapid rebound, it is invincible. The 6 spikes are scientifically distributed, combined with triangular carbon columns, to enhance the grip effect and stability, enabling athletes to sprint powerfully to cross the finish line.