NIKE free platform The advanced NIKE flyknit upper sits atop a NIKE free+ 5.0 midsole, which lies in the middle of the NIKE free spectrum, providing mid-range cushioning. (on a scale or 1-10, 1 is akin to running barefoot and 10 is comparable to a traditional running shoe.) the articulated NIKE free sole is flexible and moves naturally with the foot. diagonal hot-knifed sipes (strategically-engineered flex grooves) through the arch help ensure natural movement in the mid-foot as a runner transitions stride. The NIKE free flyknit comes on the heels of decades of biomechanics research and design exploration with the intent of providing the best run possible. the breakthrough combination of a compressive NIKE flyknit upper with a highly flexible NIKE free midsole and outsole adds up to a running shoe that delivers a more natural ride, amplifying athletes’ ability to move quickly and comfortably over distance. The NIKE free flyknit costs 160USD and will be available globally from august 1st. It can be pre-ordered at NIKE.com/freeflyknit.