Unlike the other shoes on this list, the sole of the Rider 21 is based not just on a foam blend, but also include Mizuno’s mechanical Wave plate for absorbing impact forces and reflecting the energy back into each step. The Wave plate helps give the Rider good stability, even though it is designed for a neutral foot strike. The unusually soft heel of the Rider transitions to the firm forefoot more typical of Mizuno to give the Rider an unusually fast feel in a daily trainer.