Saucony Endorphin Speed 2 Men's USA Pack Blaze your daily workouts in the Saucony Endorphin Speed 2 USA Pack! This limited-edition version builds on its award-winning introduction with a perfect blend of cushion and flexibility. Get a fine-tuned fit in the improved upper, with a rigid heel to keep you secure at high speeds. Light and springy PWRRUN PB cushioning combines with a full-length nylon plate to guide smooth and flexible transitions. A shoe that shines during speed work and long miles, the Saucony Endorphin Speed 2 USA Pack works as hard as you do to reach your goals! What's New? Improved upper includes a more rigid heel counter for a secure lockdown at high speeds. Who's it for? Athletes looking for a fast shoe to give them an edge on every run, from speed sessions to race day. Neutral runners searching for a lightweight plated trainer for faster workouts and everyday running. Runners who tried the Saucony Endorphin Pro 2 and want a softer, more relaxed ride. Shoe Technology Upper: Mono mesh upper blends comfort and breathability to keep you cool on the run. Rigid heel counter adds stability at high speeds and a comfortable lockdown over long distances. Midsole: PWRRUN PB foam provides ultralight energy return with the bounce to bring you to the finish line. SPEEDROLL Technology creates a propulsive underfoot feel, with continuous momentum to help you run faster without working harder. Full-length, semi-rigid nylon plate leads smooth and flexible transitions. Outsole: Strategically placed carbon rubber adds traction and durability in high-impact areas.