Reebok Zig Dynamic - Boys' Grade SchoolIt’s like an energy drink for your feet. As part of Reebok’s most technically advanced running shoe to date, ZigTech™ allows key leg muscles to do less, so you can do more. The Reebok Zig Dynamic features patented sole technology that conserves and returns energy for a soft and springy ride. The one-of-a-kind, zig-zag-shaped sole absorbs the impact of heel strike and with the help of the transition bridge propels you forward on toe off, while reducing wear and tear in key leg muscles. A SmoothFit comfort synthetic upper ensures provides minimal irritation inside a light, flexible and sealed upper. Forefoot flex grooves offer added flexibility while a removable PU foam sockliner adds extra cushioning. Multi-surface outsole gives traction.