Featuring WaveSpring® Technology
WaveSpring® returns energy with every step.
Spira Footwear has specialized midsoles with WaveSpring technology which disburses energy with every step you take. But don’t just take our word for it. Testing at Michigan State University reported that 87%-96% of the energy is returned from the WaveSpring. This is the highest energy return score for any midsole material ever tested.** WaveSpring recycles your energy while it cushions for comfortable and efficient wear.
“Unlike rubbers and polymers, the springs have an almost infinite fatigue life. The shoe will fall apart before the spring performance degrades.”
Popular Mechanics magazine
Shoe Technology Review