Engineered for efficiency over long distances, the Cloudboom Speedboard® is made from an explosive combination of carbon fiber and TPE. The extreme rocker shape of the bottom unit optimizes the rolling motion for even more propulsive power – and a PR-shattering kick into the finish. A new grip-rubber compound in an advanced traction pattern is designed according to the natural rolling motion of the foot. The result? A firm hold as you crush wet city courses at speed. Great preowned condition Women’s size 9.5