Nike take flex to the next level. These juniors' Free Run Flyknit trainers from Nike revamp the barefoot-like icon, equipping them with an all-new midsole that expands and contracts with every movement of the foot, delivering a precise, adaptive running experience from the first minute to the last. Single-seam Flyknit gives a sock-like feel, fusing stretch, support and ventilation together for exceptional comfort. Flywire cables lock the foot down for dynamic support that responds to the foot's actions, while auxetic foam in the midsole optimises cushioning, lessening impacts and shocks so you can focus on what matters most, every time you lace up.. Material: Textile Upper/Synthetic Sole