A breathable mesh upper with TPU overlays is set on the label's patented Tubes system that offers unmatched comfort, cushioned and incredible flexibility. Individually tuned tube structures collapse and rebound with each foot strike, while smaller, more rigid tubes on the inside area of the heel provide extra medial support to reduce pronation. Cushioning: absorbs impact and distributes weight for consistent, buoyant comfort under each step Removable insole Textile and synthetic upper/textile lining/synthetic sole Imported