First of all, the Carbon X2 is an endurance shoe that offers propulsion speed in an adaptable silhouette designed for both training and racing. Featuring a responsive carbon fiber plate and aggressive curved sole profile under the metas, for high performance shoe. The Carbon X2 Nimbus-cloud white model combines softer, lighter foam with rubberized foam outsole. Made with care to ensure optimal support to its wearer. Also Featuring a slimmed-down collar, a notched tongue and a technical mesh upper with embroidered TPU threads. And additional reinforcements around the laces. Be ready for a smooth, stable and dynamic stride.