Building upon an existing style, the Cloud X trainers from On Running are packed with new and modern updates. With an improved lightweight feel and new materials, these streamlined sneakers will keep you performing at your best. Durable engineered mesh upper with seamless synthetic overlays. Thinner tongue for lightweight feel. Traditional lacing system for secure fit. Lean engineered heel cap with precision-moulded cushioning pad technology for comfort. Breathable textile lining for comfort. Removable, dual density insole for cushioning and support. CloudTec cushioning technology active only during the foot strike. Lightweight and flexible CloudTec sole unit made from Zero-Gravity foam. 16 Cloud-pods directly attached to the Speedboard to allow the sole to adapt to the shape of your foot. Deep flex grooves for an enhanced range of motion and maximum flexibility. Central channel between the medial and lateral sides to allows for individual movement of the foot.