Nike Free 4.0 V2 --The Nike Free 4.0 V2 Mens Running Shoes is an extremely flexible and lightweight new shoe from Nike with amazing key new features, giving the runner supreme flexibility and comfort in a barefoot-like stride.The Free 4.0 V2 utilises Nanoply throughout the upper, which is a micro-layer of engineered composite material that is laser-perforated for a skin-like fit that moves with each stride. The larger perforations are strategically placed in areas that need more flexibility while the smaller perforations are in areas that demand more support. The arch has been modified with transtarsal diagonal flex cuts for enhanced twisting, strengthening, and natural motion flexibility

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