NIKE Women's Air Zoom Terra Kiger 4 Running Shoe Flymesh upper for a lightweight feel and allows your foot to breath Flywire cables work with the laces to increase comfort and balance when running Foam midsole with Zoom Air units in heel and forefoot for a springy step Top cap for added protection from rocks and tree roots Waffle design with exaggerated lugs on the bottom of the shoe for traction on wet-surfaces