More comfort. More support. More sustainable materials. That's what you can expect in the next-gen Cloudrunner. Featuring an upgraded upper, Helion™ superfoam and a new outsole that won't collect stones, it will inspire you to run even further. Best for: 5K, 10K, Half-marathon, Marathon, Recovery runs, Road running, Interval training, Short runs, Long runs, Everyday training, Warm weather, Cold weather, Changing weather. Recycled content: – Total recycled content: About 30% – Recycled polyester: About 100%.