Standard Fit X-Comfort Zone : Ventilated expandable zone to accommodate a variety of feet widths and prevent numbness Power Zone : Increased arch support and power transfer Insole : Breathable and ventilated Approximate weight (size 42/1 shoe): 10.4 oz/295 g Double-adjustment ratchet and offset hook-and-loop straps Patented injected fiberglass/nylon outsole Insole : Breathable and ventilated