Highly recommended for beginners starting their running journey. The Phantom 4 features ZipFoam™ supercritical foam with a thick 35mm heel and 30mm forefoot stack, providing exceptional cushioning that effectively absorbs impact and reduces stress on knees and ankles. At ~264g, the lightweight build keeps strides light and effortless. Topo's signature roomy toe box allows toes to splay naturally, helping new runners develop proper form. The absence of a carbon plate delivers a more natural, accessible ride. At ~NT$4,800, it offers outstanding value in the cushioned trainer category. Start with 3-5km easy runs and gradually build up.