Delivering the very best in Swiss innovation to guarantee you get the most out of your run, ON Runnings Cloudultra trainers are designed to make you feel as though youre running on clouds. Inundated with a series of performance-boosting features, from the energy-reactive sole and engineered mesh upper to the soft cushioning and elasticated laces, the pair ensures no distance is too far, with the style made to push you that much further, and faster. Fabric/Other Materials.