Fila Performance - Flow Testament (White/Nautical Blue/Little Boy Blue) - Women's: The Flow Testament was created for the runner who wants the most performance-oriented release shoe on the market that provides fantastic cushioning, dynamic propulsion and great protection. Flow Propulsion evolves Flow Technology to now include a proprietary propulsion device that accepts and stores downward energy and releases this energy after the foot reaches the windlass phase of the gait cycle to propel the foot forward through the toe. The Dynamic Landing System ensures a smooth landing with every footstrike by replicating the engineering feat of the landing gear of an airplane. The downward forces of the foot are accounted for and displaced within the midsole plane instead of the legs. Transition Control Midsole eliminates any inconsistent midfoot transition by keeping the foot and shoe in constant contact with the ground throughout the gait cycle. The result is that the transition from heel to toe is extremely smooth. Mesh and synthetic upper.