The city is a tough place to run. So we made the Cloudswift tougher. With CloudTec® in Helion™ superfoam, it's made to perform on hard surfaces and protect from impact. This is cushioning without compromise – with an engineered upper to match. From a swift 5k at lunchtime to a cross-town commute or the longer Sunday run, you'll feel the difference when you hit the streets in the Cloudswift. 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.