Built for tempo and sprints to the finish is the Saucony Endorphin Speed 5, it has also proven to be equally capable in long training sessions. The brand new engineered mesh upper is lightweight it doesn’t slow you down. PWRRUN BB foam in the midsole gives a cushioned and responsive ride whether it be for speed or for race day. The full length longitudinal groove in the outsole adds flexibility and offers a natural, smooth transition. Designed as a tempo shoe that can handle long moderate level sessions and sprinting to the finish on race duty.