An update to the original, for the smoothest ride yet. Mesh upper with no-sew overlays for ventilation and chafe-free comfort. Cushlon foam midsole with Nike Zoom unit in the heel provides soft, responsive cushioning. Lowered midsole helps foot move naturally. Rubber Waffle outsole with lateral crash rail offers traction, durability, and a smooth transition. Deep flex grooves and forefoot cross rocker increase flexibility and responsiveness. Wt. 8.9 oz.