These shoes are built to tackle longer runs. A supportive stability rail works with the responsive midsole and flexible outsole for a smooth and energised run. The heel counter locks in the fit while allowing the Achilles to move freely. Runner type Stability shoes for the long-distance runner Energised cushioning Dual-density Boost cushioning on the medial side provides energised stability for a smooth, responsive ride Stabilising support Solar Propulsion Rail helps to support and guide the foot Supportive tongue Solar Fitwing Tongue extends down around the foot for a supportive feel Reliable traction Stretchweb outsole flexes naturally for an energised ride, while Continental™ Rubber gives you superior traction