A 30mm x 25mm stack height and 5mm drop makes the new Phantom Topo’s most cushioned road running shoe. Strategically placed rubber adds traction and durability where needed; Zipfoam™, a proprietary new midsole compound that delivers more cushioning and long-term resilience than traditional EVA. A breathable engineered mesh upper with lightly printed overlays and an external TPU heel counter help keep the runner secure over the platform.