Based on Nike’s performance soccer cleat, this Flyknit Mercurial XI features an ultra-flexible Flyknit upper in dark grey, accented with rows of white stripes and a tonal signature Swoosh. A pull loop extends down to a smooth leather heel panel that adds structure and a polished look. Underneath the sock-like upper, sculpted lines etched across the bulky midsole evoke the Zoom Spiridon runner from 1997.