Mizuno Wave Mujin 9 Trail Running Shoes For experienced long-distance trail runners who prefer harsh environments such as rocks and forests, the Mizuno Wave Mujin 9 is designed to provide excellent stability, cushioning and energy return. Mesh Upper Keeping your foot well-contained and secure within the shoes, the Wave Mujin 9 uses a mesh upper. This construction allows air to flow freely and comfortably through the shoes, keeping your feet fresh and cosy, and allowing you to concentrate on the trail ahead. Not only this, but the durable mesh protects your feet from knocks and bumps, preventing dirt and mud from entering your shoes. To keep your feet feeling fresh throughout the duration of your run, the materials are moisture-wicking, meaning the shoes will keep your feet dry even during the more intense sections of your run. The forefoot is protected by thicker material that covers the toes, preventing bumps and shocks from causing any damage. The material surrounding the rearf.