Worn only one time From the website: About this item Get the know the softer side of SPEEDROLL Technology with an extra 2mm of PWRRUN foam and an elevated PWRRUN+ sockliner. Durable and lightweight mesh pairs with a streamlined heel clip for support that doesn’t weigh you down. With a new centralized torsional heel groove, you can touch down and roll forward more easily than before. Description Get more of a good thing in the Endorphin Shift 3. With a higher stack of PWRRUN foam and a deeper midsole cradle to sink into, it makes your training plan feel like vacation mode