Simple Design Plush mesh is placed at the forefoot and along the collar for a comfortable feel. Additional skins throughout add durability. More Flexibility A foam midsole delivers a softer ride than the Revolution 5. The outsole has a computer-generated design that creates a natural piston effect as you run, providing more cushioning and flexibility. They combine for durable traction. Intuitive Touch Touch points at the heel and tongue create a natural feel as you take the shoes on and off. 100% recycled polyester laces.