Womens yellow and black, Saucony endorphin shift 2. Worn once, I cannot return. The tech isn’t working for me! 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.