Runners will enjoy a lightweight, flexible and cushioned ride in the Saucony Zealot ISO2 running shoes. The dynamic nature of ISOFIT adapts to the individual shape and motion of your feet providing personalized comfort without added weight. Look stylish, run fast and feel the energy in every step of your run.Upper: ISOFIT creates a dynamic fit and adapts to the shape and motion of the runner’s foot. Lightweight and seam-free FLEXFILM provides great comfort and allows toes to splay. Reflective synthetic at collar enhances visibility. RUNDRY lining to wick away moisture.Midsole: EVERUN Topsole for lasting cushioning and consistent, lively energy return throughout the run. SRC Landing Zone through midfoot offers better transition.Outsole: TRI-FLEX Outsole Design to enhance ground contact and better flexibility at toe-off. iBR+ provides a soft yet responsive ride at a 33% lighter weight than standard blown rubber. XT-900 carbon rubber offers exceptional traction and high-wear properties.