Mizuno Wave Rebellion Flash 2 (26cm) - No Box Upper Features: Mesh Upper Material: Synthetic Fiber Sole Material: Synthetic Sole Weight: Approximately 245g per shoe This racing shoe has evolved significantly from the previous model and is designed for runners aiming for a full marathon time of 3 hours to 3 hours 30 minutes. Recommended pace is around 3 minutes 30 seconds to 5 minutes/00 seconds per km. This model incorporates Mizuno's unique speed technology, "Smooth Speed Technology." It guides the runner towards a more efficient running motion, similar to forefoot running, and reduces fatigue in the calf muscles, assisting in achieving goals. The midsole features a 3-layer structure that sandwiches a glass fiber-reinforced nylon plate between two layers of foam, providing easy wear, high cushioning, rebound, and stability. MIZUNO ENERZY LITE+, also used in the Wave Rebellion Pro 2, is employed in the top midsole closest to the foot, providing a soft feel. MIZUNO ENERZY foam is used in the bottom midsole, offering a more comfortable feel compared to the Wave Rebellion Pro 2. The outsole is also a rubber outsole, providing a natural and soft ground contact feel. The upper, which uses a racing last, also features an inner strap to reduce foot movement during high-speed running. The insole is not removable.