The Topo Phantom women's training shoe features a 30mm x 25mm stack height and 5mm drop, making it one of Topo's most cushioned road running shoe. The tactically placed rubber adds traction and durability wherever needed. The ZipfoamTM, a proprietary new midsole compound delivers more cushioning and long-term resilience than the traditional EVA. The shoe features breathable engineered mesh upper with lightly printed overlays and an external TPU heel counter. It also features a roomy toe box.