From the pavement to the gym, Fli-Lyte 4 delivers lightweight versatility, making it your go-to shoe for up-tempo daily miles and your favorite workout. The sleek new upper features a recycled engineered mesh with zero overlays for lightweight security and a breathable, comfortable fit. New lace stays on the tongue keep it locked in place over the foot. The midsole gets an upgrade with ZipFoam™, delivering more response and resisting compression set over time. The widened 23 x 20 mm platform delivers and even smoother and more stable ride..