The Stinger Competition is Spira's newest high performance lightweight road racing flat with an exceptional amount of cushioning for such a lightweight shoe. With two WaveSprings in the forefoot
and one WaveSpring in the heel, the technology provides maximum energy efficiency for racing a 5k to marathon distances. The shoe is designed for the runner who is biomechanically efficient and
wants to run fast without adding the stress and fatigue associated with lightweight racing flats.
Racing shoes