The Softer side of Fast - Max cushioning. Full speed. Enjoy a truly effortless ride in the Endorphin Shift. With a lofty bed of PWRRUN cushioning and fine-tuned stability features, it guides and propels your stride with continuous momentum. And with its supportive and breathable mesh upper, you can look forward to faster, feel-good runs every day of the week.OVERVIEWSPEEDROLL Technology propels you forward with the feeling of continuous momentum, so you can run faster, not harder.A generous bed of EVA-based PWRRUN cushioning provides a plush yet springy ride, perfect for any day of the week.External heel support works with a midfoot wrap to provide lightweight structural support that guides the foot through each stride.FORMFIT hugs the foot in 3D comfort and delivers our most personalized fit yet.An engineered sandwich-mesh upper keeps the shoe light and breathable.XT-900 outsole with reinforced high-abrasion zones provides optimal traction and durability

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