Spira Stinger Competition ShoesRoad racing flat that champions lightweight performance. ; Built for the biomechanically efficient runner, this shoe runs fast without adding the stress and fatigue associated with lightweight racing flats. ; WaveSprings™ in both the forefoot and the rearfoot maximize energy efficiency for racing 5k to marathon distances. ; WaveSpring™ technology delivers unparalleled cushioning and energy return to successfully reduce stress and fatigue. ; Laterally stable and lightweight, WaveSpring™ stores and disburses energy with every step while minimizing impact shock. ; Long-lasting springs provide a new sneaker experience throughout the life of the shoe. ; Integrated spring housing complements each spring that has been fine tuned to the corresponding size to offer optimal cushioning. ; Independent forefoot springs facilitate forefoot flexibility and optimize push-off energy. ; Innovative upper is a fusion of 3D mesh and single mesh that imparts breathability and a secure fit. ; Rubber outsole provides necessary traction for racing. ; 7.70 oz. ; Product measurements were taken using size 7. Please note that measurements may vary by size.
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Models and Styles of Spira Shoes
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