ST-3 features a new knit upper mesh pattern with fewer printed overlays. The new blucher style upper offers a snug and secure fit through the midfoot. A 16mm, 0-drop platform is perfect for speedwork, tempo runs, and gym work. The rubber outsole pods are strategically placed to enhance traction and durability where it matters. The ST-3’s collapsible heel allows the shoe to pack flat, making it a versatile run/workout shoe for travel.