Built to deliver distance-friendly, durable cushioning, the 870 is perfect for the high-mileage neutral runner looking for superior comfort, total fit, and insurance against fatigue-induced gait instability. The 870 features N-ergy® cushioning in the heel for strike-resistant shock absorption and a mild dual-density post to stabilize mild overpronators or the fatigued neutral foot. This special rainbow edition will be the envy of everyone you see!