Highly recommended for beginner runners with mild overpronation. The Ultrafly 6 is Topo Athletic's stability road shoe, featuring ZipFoam™ supercritical foam (32mm heel/27mm forefoot) with a medial support structure that effectively guides foot motion and reduces stress on knees and plantar fascia caused by excessive pronation. At 272g, it's lightweight for a stability shoe. Topo's signature roomy toe box allows natural toe splay, and the 5mm drop encourages a natural midfoot strike. At ~NT$4,800, it offers excellent value. Start with 3-5km easy runs to adapt to the stability platform.