The GLIDERIDE shoe lets you run longer while expending less energy. GUIDESOLE technology in this sole is the key function in the GLIDERIDE shoe. Here is how it works: Improved cushioning reduces muscle load at foot strike. It does this with a combination of FLYTEFOAM technology and GEL technology cushioning. The stiff forefoot and dynamically curved sole increase running efficiency by reducing the movement of the ankle joint. A lower degree of ankle flexion means other muscles, such as the calf, don't have to work as hard. Too much ankle movement at speed wastes energy. The shoe