The On Cloudrunner 2 Waterproof Shoe provides the airy cushioning, forward propulsion, and sleek style that we love, now with a waterproof membrane and updated features to keep us going. The new underfoot construction prevents rocks from sticking into the sole, keeping our motion fluid and ending stops to shed stones. Helion superfoam offers the energy transfer we need for speed, and Cloudtec cushioning keeps our feet fatigue-free and comfortable.