Men's Saucony Endorphin Shift 2 Running Sneaker Shoes in Blue Walmart.com Men's Endorphin Speed 4 Running Shoes Saucony Saucony Shoes Saucony Mens Endorphin Speed 2 Running Shoe Size 1 Us ENDORPHIN SPEED 2 Reverie Saucony Australia. The Endorphin Speed 2 is a natural winner and now it? s back and better than ever Between its ultralight PWRRUN PB cushioning and responsive nylon plate it? s evident this shoe can do it all From speed work to longer runs from workouts to race day it? s more than ready to rock