loudTec® sole moves with you Separated by a central channel, the CloudTec® sole responds to your individual gait. The Cloud elements are affixed directly to a semi-transparent Speedboard allowing each Cloud element to move individually. Reduced to the pure maximum The Cloud with Zero-Gravity foam and Ons patented Swiss CloudTec® technology is the lightest running shoe in the world, with outstanding cushioning and impact protection. In other words, reduced to pure maximum. Experience the combination of a soft landing with an explosive take-off for an unbelievably light running sensation.