The fitness shoe you love in a new low, streamlined silhouette! The Champion Fitness Pace Swift features Dynamic Rocker Bottom Technology: the curved sole creates a natural heel-to-toe rocking motion that encourages muscle toning by creating a slight instability. Other features include Midfoot Overlays that form a tight hold on the midfoot for maximum stability, a mesh upper that optimizes breathability and comfort and a rubber outsole for durability and traction. Leather, rubber and manmade materials.