Lightweight pu midsole with contoured arch for long-lasting support and comfort4mm midsole drop and stability shank, Fit Tip: This style is running a 1/2 size small. We suggest ordering a 1/2 size larger than your usual size. Hydrophobic mesh liningNon-marking rubber outsole with razor sipping ; TPU stability shank ; PFC Free materialsMulti-directional flex grooves for natural flexibility and improved ground contactClean sport NXT. Organic odor control