Upgrade your run with Topo Athletic Women's Cyclone Road Running Shoe, the lightweight, fast and nimble trainer. The EVA midsole features a ZipFoam core for a snappy, responsive ride. The 28 x 23 mm stack height provides an optimal level of cushioning on a neutral platform. Strategically placed rubber on the outsole enhances traction and durability. The ultra-light, seamless engineered mesh upper delivers a breathable and secure fit. These women's road running shoes are great for 5Ks, 10Ks and half marathons.