A 30mm x 25mm stack height and 5mm drop makes the new Phantom Topo's most cushioned road running shoe to date. Strategically placed rubber adds traction and durability where needed; Zipfoam, a proprietary new lightweight midsole compound keeps this shoe springier with more rebound 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