The INOV8® F-Fly shoes' DNA of lightweight, natural movement, and grip maximizes your every step, on any surface, from the trail to the gym. Featuring an ample toe box, these lace-up shoes are made of a lightweight nylon upper that offers breathability. The EVA insole and polyester lining keep your feet cool and comfortable. Flexible and durable, these shoes can handle all workouts including cardio.