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The shoes that were banned from the Boston Marathon are new and improved for 2014!After 3 years of extensive research and development, Spira has taken the performance of its revolutionary running shoes to new heights.
These ultra light Stinger 2 running shoes boast the next generation of WaveSpring technology featuring 3 re-engineered springs that absorb shock & return energy back into your step to propel you forward. So you'll run faster with less stress & fatigue. And they only weigh a mere 7.8 ounces! Also features removable footbed, lace-up mesh upper & rubber outsole. Women's Size 7