Feel the shoe with the energy boost. Zig Fuel, the first ZigTech shoe built for running, allows key leg muscles to do less, so you can do more. Its patented sole technology maximizes energy return for a soft and springy ride. It's like an energy drink for your feet. - Synthetic mesh upper for comfort, support, breathability and fit - ZigTech, one-of-a-kind zig-zag-shaped sole, absorbs the impact of heel strike and propels you forward, while reducing wear and tear by up to 20% on key leg muscles - SmoothFit smooth seam upper offers ultimate in comfort with minimal irritation; upper support design promotes proper lateral stability - DMX Shear cushioning panels for added comfort and reduced heel stress - Removable sockliner accommodates orthotics - Forefoot flex grooves for increased flexibility - Multi-surface outsole for increased traction - Color: White/Black/Silver