LIGHTWEIGHT AND FLEXIBLE. The Nike Flex Runner is built to be light and flexible. The stretchy slip-on design has leather on the sides for structure and support. A flexible foam sole provides lightweight cushioning. Stretchy, breathable fabric has a slip-on design that feels snug. Leather sides with elastic straps help secure your foot. Flexible foam sole provides lightweight cushioning.
Upper - Textile, Lining and Sock - Textile, Sole - Other Materials.