The second component is flex grooves built across the tooling, which increase responsiveness. Thirdly, the full-length lateral groove in the midsole reinforces stability throughout the gait cycle. To help make the fit of this shoe comfortable, the OthoLite sockliner is dual layer. This sockliner also helps with air circulation, and provides antimicrobial function. As far as the exterior of this shoe goes, the outsole of the Puma Women's Faas 500 is EverRide. This is a blown rubber outsole that reduces weight while improving forefoot cushioning.