Crafted with a breathable engineered mesh upper, the Altra Women's Provision 6 Running Shoes are secure fitting and highly breathable so your feet stay cool. Premium Altra EGO™ cushioning gives a comfortable and responsive stride and InnerFlex™ grooves alongside FootPod™ technology offers flexibility and enhanced performance that promotes a natural stride. Featuring GuideRail™ to realign your foot as needed for a smooth and efficient running experience. Balanced Cushioning With a zero-drop construction, your heel and forefoot are placed at the same distance from the ground ensuring comfortably balanced cushioning that promotes proper, low-impact form with each stride. ALTRA EGO™ dual midsole Combining dual-natured midsole compounds the ALTRA EGO™ delivers premium underfoot cushioning with increased energy return snappy ride with forward-propelling responsiveness.  INNERFLEX™ grooves Allowing your foot to flex thanks to grid-like grooves in the midsole for lightweight speed and enhanced performance. GuideRail™ support system Running through the midsole, the GUIDERAIL™ adds stability and smoothly guides your foot through the gait cycle for an efficient stride. FootPod™ technology Mapping the bones and tendons of your foot, the FOOTPOD™ technology at the outsole enhances flexibility and allow your foot to move naturally.