Endorphin Speed 4 Width:Regular And the carbon fiber Flyplate

And the carbon fiber Flyplate and ultra-responsive ZoomX foam midsole combine to give you race-day speed

Secure Traction:

High-abrasion rubber on outsole provides traction

Altra EGO™ FLO

The Spenco Polysorb Cross Trainer Insole offers the best combination of shock absorption and energy return

Endorphin Speed 4 Width:Regular And the carbon fiber FlyplateWe're all seeking relationships that go the distance. The Endorphin Speed 4 running shoe is here to fill the role. Designed as a race day shoe, it's quickly proven itself much more, equally capable during long, moderate training sessions and sprints to the finish. Thanks to the "just right" combination of winged nylon plate, SPEEDROLL technology and PWWRUN PB foam, this cushioned running shoe provides the perfect balance of support, rebound and