adidas adiStar Ride 4W Womens Running Shoes Synthetic AdiPRENE+ in the forefoot maintains propulsion and efficiency AdiPRENE under the heel for superior cushioning at impact TORSION SYSTEM for midfoot integrity FORMOTION for motion control and optimum ground adaptation New GEOFIT+, construction uses FitFoam to mould the shoe to the shape of the foot, reduces irritation and guarantees a comfortable and secure fit