A well cushioned training shoe that provides excellent forefoot and heel cushioning. The patented WaveSpring^® technology is located in both the heel and forefoot for maximum impact absorption and energy return that will not break down over the life of the shoe. The mid-foot is supported by a molded external shank support structure to aid in torsional stability.

A well cushioned training shoe that provides excellent forefoot and heel cushioning. The patented WaveSpring^® technology is located in both the heel and forefoot for maximum impact absorption and energy return that will not break down over the life of the shoe. The mid-foot is supported by a molded external shank support structure to aid in torsional stability.

The Spira^® Stinger XLT with patented WaveSpring^® technology is a high performance trainer and is an ideal race day shoe for the majority of runners who need the support of a training shoe, with the lightweight responsive qualities of a racing flat. The Stinger XLT shares many of the same characteristics as the Stinger Racing Flat. It is an extremely well cushioned shoe that maximizes racing performance and reduces fatigue. The two independent forefoot and one heel WaveSpring^® are low profile, lightweight springs made of stainless steel to maximize cushioning and resiliency.

The Spira^® Stinger XLT with patented WaveSpring^® technology is a high performance trainer and is an ideal race day shoe for the majority of runners who need the support of a training shoe, with the lightweight responsive qualities of a racing flat. The Stinger XLT shares many of the same characteristics as the Stinger Racing Flat. It is an extremely well cushioned shoe that maximizes racing performance and reduces fatigue. The two independent forefoot and one heel WaveSpring^® are low profile, lightweight springs made of stainless steel to maximize cushioning and resiliency.

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.

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.