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- Nike Free Advantage is for the girl who trains to become a better athlete and is looking for every advantage to get there. UPPER : A lightweight nano-ply constructed upper with laser cut-outs that allow for training specific support, flexibility and breathability. MIDSOLE : A Phylite dual injected midsole provides lightweight cushioning with training specific Nike Free sipes for multi-directional barefoot-like flexibility. OUTSOLE : Strategically placed rubber pods for training traction just where she wants it on any surface