New for 2011, the Power Grid Cortana features new and innovative PowerGrid technology. As a result, the shoe offers incredible levels of comfort and cushioning as you run.

Using Sauc-fit the upper locks the midfoot onto the platform and also manages to keep the heel secure and comfortable. The hydrated collar lining allows the shoe to breathe and helps wick unwanted moisture away, leaving your feet in a far better condition to compete. The HRC Strobel Board increases cushioning and step-in comfort, a quality only enhanced by the Comfortride memory foam used in the sockliner and footbed.

A combination of PowerGrid and PowerFoam technologies ensure the shoe has incredible responsiveness and cushioning, while the Impact Interface and SRC Impact Zone both provide shock attenuation, cushioning impact in the heel, and setting the foot up for a smooth transition.