Saucony Endorphin Pro 4 is the Latest Edition of the Popular Endorphin Pro Series, Designed to meet the needs of Competitive Runners. With a focus on speed, Comfort, and Performance, this shoe is Designed to help you reach your Running goals and Experience new Heights on your runs. The Fourth Version of the Endorphin Pro Series has Received Upgrades, Including an Improved dual Cushioning System and a new Grid-designed Outsole that Ensures Maximum Traction and Durability. The shoe also has an Enhanced upper that Provides a Comfortable and Secure fit, as well as a new Insole for extra Comfort. Endorphin Pro 4 Combines Saucony's Advanced Pwrrun PB Midsole with the new Pwrrun HG foam, Resulting in a Well-balanced feel and an even Higher level of Energy Return Compared to Previous Models.