The unique upper design of the Nike Free Run+ 2 was inspired by the anatomy of the foot, in which seemingly delicate bones, ligaments, tendons, and muscles are interconnected in a remarkable latticework that enables the foot to support enormous impact and pressure. Similarly, the multi-layered upper design of the Nike Free Run+ 2 features minimal overlays that allow for a much wider range-of-motion than would be possible in a conventional running shoe. But, working in concert, those layers are also sufficiently robust to provide the support runners need.
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