Updated with a slightly looser weave in the upper, the new Nike Free 3.0 Flyknit is ready to give you the run of your life. One-piece Flyknit construction conforms to the shape of your foot for a breathable, sock-like fit. Hexagon flex grooves in the midsole encourage a full, natural range of motion. Environmentally preferred rubber pods in the outsole for traction and durability where you need it most. Wt. 6.8 oz.