Feel-good cushioning and speed. Every run gets better in the Endorphin Shift 3. Stacked with PWRRUN cushioning for comfort, it uses enough foam to help you transition effortlessly from week to weekend. Featuring SPEEDROLL Technology that propels you forward effortlessly, a taller bed of PWRRUN foam that comfortably cushions your stride, a streamlined heel clip that hugs and supports your foot with less weight, and a deeper FORMFIT design hugs every part of your foot for a personalized fit and feel. This is a shoe that can keep up no matter the workout.