Max cushioning. Full speed. The Endorphin Shift 2 is the definition of effortless performance. It mixes a lofty bed of PWRRUN cushioning with propulsive SPEEDROLL Technology, so you get more out of each stride. And with its perfect touch of stability, you can count on lots of feel-good miles, every day of the week. Have been worn appropriately 5 times. Condition is 9.5 out of 10! The pictures show a little dirt but nothing that cannot be cleaned. Remember these are machine washable , however I have not. COMFORTABLE!!!