The S1 is our take on the everyday road trainer, engineered to meet the mileage demands of ultrarunners. Designed to excel on the longest training runs, it has been proven in training and competition the world over. With all the comfort and longevity you need, the S1 supports you through every step.

• ZeroSag midsole insert with little degradation during long runs
• LightCELL midsole base featuring excellent lightness and bounce
• GOFLOW midsole geometry to guide your stride
• Outstanding stability for your long-distance training
• Breathable and eco-friendly

Style: M211M40100WW