Designed for ultra-distance races on technical terrain, this model features a Cloud Tec® cushioning system for stability and efficiency. Helion™ HF hyper foam provides energy return and impact absorption, ensuring control over long distances. True to size. Cloud Tec® cushioning system for stable runs dual-density Helion™ HF hyper foam for energy return on technical terrains nylon Speedboard® for stable movement Missiongrip™ outsole for traction on mixed terrain durable upper for protection on rugged terrain secure, technical fit