For runners aiming for a sub-4 marathon. The speed-enhanced BOSTON 12 is the perfect partner for both racing and training. - Brand: adidas - Model: ADIZERO BOSTON 12 - Size: 28cm - Color: White/Solar Red - Features: Thick-soled shoes. Lightweight design, breathable upper, high-performance model equipped with high-rebound propulsion technology using glass fiber. The outsole forefoot uses "Continental Rubber," a rubber compound from Continental, famous for automotive tires. - The wider sole makes it difficult to lose your posture even in the latter half of the race when you're tired, supporting stable running.