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The spring-powered shoes that make you run so fast and jump so high, they were banned from the Boston marathon!These Spira women's running shoes have WaveSprings in the heel and forefoot that store and release 96% of energy otherwise lost to the ground.
They propel you forward with amazing ease and provide unsurpassed cushioning that helps reduce fatigue and impact. Also features breathable mesh/synthetic uppers, built-in arch shank for torsional stability, removable sockliner, reflector material on heel and high abrasion rubber heels. Womens Size 8