The ZigMaze from Reebok maximize energy return while at the same time minimizing leg muscle fatigue thus allowing you to run faster and further, with less overall stress. This pair of shoes features: Synthetic upper for lightweight support and durability. SmoothFit comfort lining for a perfect fit with no irritation or slipping. Removable PU insole for extra comfort. Exclusive Dynamic-sole Zig-zag technology provides great energy return for a soft and springy ride by absorbing heel strike impact and aiding toe off propulsion which reduces wear and tear in key leg muscles. Walking Stride Guide for added support and beveled heel for enhanced footstrike. Forefoot flex grooves ensure flexibility. Multi-surface outsole for superior traction.