DECONSTRUCTED LOOK, CONFORMING FIT. The Nike Flex Contact three gives you the benefit of laces without the hassle of tying them. An elastic, slip-on lacing system pairs with a floating heel strap for pressure-free support. A knit upper adds stretch, while the outsole with heel-to-toe grooves follows the natural flow of your foot. Elastic laces let you slip in quickly yet securely without tying them. Stretchy knit and synthetic upper conforms to your foot. Floating heel strap secures the back of your foot while also giving a feeling of freedom. Full bootie construction makes the shoe super easy to slip into and take off. Soft, dual-density foam in the midsole assures smooth cushioning. Flex grooves in the outsole provide enhanced flexibility. Design mimics your foot's shape and follows its movements.Upper - Textile, Lining and Sock - Textile, Sole - Other Materials.