The Spira® Genesis X Stability Runner provides support for the mild to moderate pronator by incorporating a wide heel platform and a high density medial post. A firm midfoot shank insures a smooth transition from heel strike to toe off. The patented WaveSpring® technology provides unequaled cushioning properties without compromising stability. The full strobel construction offers a lightweight and flexible solution to lasting. The dynamic fit system™ adjusts to the changing dynamics of the instep during the gait cycle.







