SAUCONY Women's Triumph ISO 3 running shoes feature an engineered mesh upper for a dynamic and lightweight fit. ISOFIT creates a dynamic fit system by adapting to the shape and motion of the runners foot. EVERUN Topsole construction for enhanced energy return and continuous cushioning throughout the run. Updated Everun Landing Zone centered under the heel for maximum energy return at heel strike. TRI-FLEX outsole design provides greater ground contact and optimal flexibility.