Worn only once! Cloudmonster. Designed to deliver the lightest stride ever, these runners feature a Helion superfoam midsole for cushioning comfort even at explosive speeds. The aggressive Speedboard and radical rocker shape make you run better for long hours. Finally, the rubber outsole delivers traction with every take-off and landing, helping you reach new heights in training with the ON Cloudmonster. Upper made from recycled polyester and soft-touch comfort fabric keeps your feet snug. Soft sockliner delivers plush comfort. Weight: 9.7 oz.