The Nike Flex 2017 RN running shoe is built to deliver a flexible ride. With an easy fit, the lightweight style has a circular-knit construction that allows the foot to flex naturally. Flywire cables integrate with the laces for dynamic lockdown, and a dual-density foam midsole provides lightweight cushioning. Sections of the rubber tread form a triangular pattern at high-wear areas to enhance durability. This Nike Flex RN 2017 hosts darks tones of black and grey.