ON Cloudalpine Waterproof Safari/Black Engineered with ON's signature running tech, the Cloudalpine Waterproof makes light of technical terrain. A CloudTec® midsole provides comfort, while a unique Speedboard® pushes you farther. Injected nylon with 15% carbon energizes each step, so you're ready come what may. Weight: 590g CloudTec® heel cushioning for soft landings on hard terrain Speedboard® provides extra stability on challenging surfaces Fast lock system seals in the comfort Specialized lugs increase traction on mixed terrain