The Nike Rival Fly 4 can help you push your pace. Its lightweight, low-profile design has a forefoot Air Zoom unit and Cushlon 3.0 foam to help keep you fast on the road and fresh for your miles. Breathable mesh The lightweight mesh on the upper provides breathability. Responsive pop A forefoot Air Zoom unit provides responsiveness at toe-off and a consistent pop. Softer, more responsive Cushlon 3.0 foam is softer and more responsive compared to the previous iteration. Faster transitions Strong, midfoot plastic piece offers faster, more responsive transitions compared with the Rival 3. Extra padding Race-inspired tongue is extra padded and has perforations for comfort and breathability. Product Details * Weight: approx. 258g (men's UK 9) * Heel-to-toe drop: 8mm