NIKE Lady Flex Experience Running Shoes Synthetic Mesh Upper - Breathable upper keeps the feet cool and comfortable even when training gets heated. Moulded Outsole - Flex outsole unit offers great flexibility, with soft springy cushioning for response and stability. Reinforced Overlays - Synthetic overlays reinforce shoe durability and secure the shoe with a better fit. Reflective Swoosh - Ideal for low light conditions. Synthetic Sole Pads - Harder wearing sole pads are placed on specific parts of the outsole in higher wearing areas, to enhance durability.