Run the city in the light, swift shoe with full road protection. Features Helion superfoam for high performance in urban environments. CloudTec in Helion superfoam gives the Cloudswift cushioning with zero compromises. Engineered for urban running, Helion is light on weight but big on energy return and durability. Temperature resistant, it provides the same unrivaled performance in hot and cold conditions. Durable rubber reinforcements provide high traction at high speed, even on wet roads. The breathable engineered-mesh of the inner sock construction keeps your feet cool, even when on-the-road temperatures soar. Strong yet stretchable, the TPU mechanical side band delivers gentle midfoot support during swift city sprints. It also gives you a hiding place to stash your laces.