Flex 2017 RN 'Dark Sky Blue'

The Flex 2017 RN 'Dark Sky Blue' sneaker uses Nike’s free moving technology for enhanced flexibility and performance. The shoe is constructed of a circular knit upper, synthetic overlays and wrapping Flywire cables. Unveiled in 2008, Flywire is inspired by NASA's utilization of Vectran filaments, known for its ultralight resilience. The two-level Phylon foam midsole and the auxetic tri-star patterned outsole cushions the foot.