This is the most cushioned neutral training shoe. Utilizing an Aerofoam midsole straight from the aeronautical packaging industry, this shoe offers a smooth ride and superior comfort. The updated version features a new lightweight and breathable upper package. This is an ideal shoe for high mileage training. This shoe boasts an EVA rubber midsole, and a synthetic and mesh upper. Equipped with eRide technology such that the unique rocker shape creates a very stable midstance that promotes the faster and more efficient running style that runners strive for. eRide flow is individually engineered in each of our models to guide, cushion and support for specific foot types.