Women's Altra One 2.5

The new one 2.5 is built for speed, without sacrificing the comfort needed to maintain it through the finish line. A footshape toe box lets your toes relax and move freely for incredible comfort, extra stability and a more powerful toe-off. Inner flex technology adapts to the flexion of your foot with omnidirectional flex grooves in the midsole. Responsive a-bound cushioning protects the feet at impact and rebounds to add a spring to each step.