Ultra-lightweight flexibility. The Nike Free Flyknit 4.0 running shoe continues the tradition of Flyknit with a woven upper that conforms to the foot for breathable, lightweight comfort with each stride. Flywire cables deliver support without extra weight, while the flexible Nike Free mid-sole/out-sole gives you a natural range of motion over any distance.
· Rubber sole
· Flyknit upper for ultra-lightweight support and breathability
· Flywire cables for lightweight support and an adaptive fit