Tackle any terrain with the all-new ON Cloudultra 2. Designed for long distances and ultra running, step into comfort with extra plush Helion superfoam that delivers a smooth ride on the toughest of terrains. Featuring an updated stud layout that provides 50% more ground contact you'll feel as confident as ever as you run over anything the trail throws at you. 100% recycled polyester knitted sock upper promotes air flow in while keeping debris out.