Brooks PureFlow Women's Running Shoes Full Length BioMoGo DNA Midsole - Brooks have blended both BioMoGo and DNA technologies to furnish the entire midsole with adaptive properties. With each foot strike, the BioMoGo DNA tailors the cushioning and responsiveness to the specific needs of each and every runner. IDEAL Heel - A curvature in the heel shifts the contact point forward so the runner lands with more ground clearance under the middle of the heel. This aligns the joints to encourage optimal energy return and reduce internal stress. Split Toe Flex - A midsole forefoot split allows the hallux to function independently and engage the runner's natural balance. Flexible materials empower a more efficient push off during the propulsion phase. Wider Nav Band - This flexible band wraps over the instep to comfortably secure the foot in place. Dynamic Stretch provides just the right amount of support and can accommodate different foot shapes with a comfortable, assured midsole fit. Anatomical Last - An anatomical last mimics the shape of the foot to provide close support and a glove-like feel. Longer at the hallux and tapering to the smallest toe, this shape matches the runner's anatomy and allows the shoe and foot to work as a single entity.