2 different tones. Nike Downshifter 9 mixes dense mesh at the back that holds the foot in all types of running, with open mesh in the forefoot that provides optimal ventilation. Soft foam and flexible grooves under the foot provide smooth running. Open mesh at the forefoot releases sweat while cool air flows in. Tight mesh through the midfoot to the heel provides built-up support. Soft, flexible foam in the midsole dampens the running. Cut heel gives an elegant expression and stable feeling. Rubber outsole provides an excellent, durable grip. Flexible grooves allow the foot to move naturally.