The perfect combination of cusioning and light weight to keep you running fast throughout even your longest runs. Breathable mesh upper with lightweight synthetic overlays for flexible support that hugs the foot and moves with you. U4ic and Infinity Wave cushioning for a fast an efficient heel-to-toe transition. Carbon rubber outsole with SmoothRide Engineering for traction on multiple surfaces. Deep forefoot flex grooves work with the articulated Wave Plate to create a strong, natural stride that propels you forward with more energy. Wt. 12.1 oz.