Experience a new reality in a shoe with gentle guidance, made to lead you on a euphoric and effortless road run. Featuring GuideRail™ technology, with medial guidance for an inherently stable ride, and a new lightweight and efficient Altra EGO™ P35 midsole foam. Hit the road for daily miles or training runs with the comfort and stability your feet are craving. It's got the Altra Fit, with room for your toes and a secure midfoot for natural movement. A low 4mm drop with rocker shape geometry helps promote natural body alignment and an efficient toe-off. With an updated engineered mesh upper and a redesigned heel collar, you've got breathability and the comfort you need to get out of your comfort zone. Lace up, space out, and let the Experience Flow ST guide you on a journey.