These streamlined kicks, first introduced in 1997, were inspired by ripple lines from water. The sleek design looks fast, and the heel-to-toe Max Air unit puts a little extra bounce in your stride. Benefits: Synthetic upper keeps the fluid look of the original while adding comfort and durability. Breathable fabric underlays help keep the shoe airy. Originally designed for performance running, the full-length Max Air unit adds soft comfort. Foam midsole feels springy. Rubber outsole adds traction and durability. Hidden lacing system was a first of its kind and delivers a streamlined look. Product Details: Foam insole. Not intended for use as Personal Protective Equipment (PPE).