Cut in half: On Cloudboom Echo 3 Review | RunRepeat。A fusion of cloudtex and Helion HF Hyper foam for the fastest race day shoe, get ready to outrun your echo. Activities Running, Road running, Competition, Marathon Key features • Weight: 215.0 g • Built with CloudTec® and Helion™ HF hyper foam • Every element is engineered for performance • Rocker-shaped carbon Speedboard® • Impact protection and high energy return • Ultralight and weighs only 188-215g* • Approved by elite-level athletes • Silicone inserts and cushioning where you need it • Thin, breathable, complete with one-piece upper M