Nike metcon repper dsx mens trainers the mens nike metcon repper dsx trainers are perfect for the next time you plan on hitting the gym featuring flywire technology to the laces that helsp to lock the foot down firmly into the shoe while the flex grooves to the forefoot increase the natural flexibility of the foot these nike trainers also benefit from a a breathable mesh across the upper with perforation holes to key areas to keep your feet cool and comfortable completed with the iconic nik