Style#: CN9518-001Full-length Nike Zoom Air cushioning is articulated to follow the shape of your foot, providing a great heel-to-toe transition. For the first time ever in a signature shoe, it??s stitched directly to the upper instead of being set into foam, so it responds to your force.An additional Zoom Air unit stacked in the heel gives you extra bounce on court.4-way directional Flywire cables provide targeted stability and on-the-fly lockdown. They relax when you??re not in motion, but when you need them to perform they deliver.A perforated midsole helps keep the foam very flexible while helping to reduce overall weight and giving visibility to the cushioning within.