Stability. Versatility. Maneuverability. The On Cloud X in Silver and Almond is Swiss Engineered to crush any and every movement-based workout. Refined to the specifications of multi-functional athletes, it punches well above its ultralight weight. Cutting edge technological innovations and a Helion superfoam injection means the second-generation Cloud X improves on all the strengths of its predecessor, and is even more durable. This powerhouse never backs down from a challenge, and is at home on the track, street or in the gym. Leave limits behind. If you have not worn On Shoes before, On suggests sizing up a half size from your normal shoe size. All size listed are USA Sizes!