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 natural range of motion over any distance..

• Flyknit upper for ultra-lightweight support and breathability
• Flywire cables for lightweight support and an adaptive fit
• Knit-in ventilation holes at the quarter panel for enhanced breathability
• Nike Free midsole with hexagonal flex grooves for multidirectional flexibility

Flyknit upper for ultra-lightweight support and breathabilityNike