Mesh Upper: The mesh upper offers a comfortable, breathable feel. Foam Midsole: The foam midsole delivers intuitive cushioning through comfort-focused rocker geometry. Cushione Outsole: The outsole has an intuitive Nike design and flex grooves in the forefoot that create a comfortable and cushioned effect as you run. Touch Points: Touch points at the heel and tongue create a natural feel as you take the shoes on and off. What's New? Mesh on upper is more breathable than the Revolution 7, helping keep you cool.