Inverted Heel encourages contact points to shift forward: Aligns the joints and creates optimal energy return. Split toe forefoot feature designed to isolate first ray (big toe): Independently empowers the big toe to engage the runner's natural stability, creating a more efficient and aligned toe off. Blended version of BioMogo & DNA smart cushioning.: Adaptively tunes the cushioning and responsiveness to the specific needs of each and every runner. Elastic band ( Nav Band) wraps over the instep: Creates a comfortable, assured arch fit. Enhancing fit and feel. Offering additional support assurance when needed. Anatomical last mimics shape of foot: Contours the foot. Minimizes the use of material to provide true support and a glove-like feel. Internal PDRB (Progressive Diagonal Roll Bar): Helps prevent overpronation… They shoes are preowned they’re in excellent condition.. please see all pictures very nice shoes!