Intuitive performance. The Nike odyssey react flyknit 2 running shoe offers a strategic combination of lightweight Flyknit and synthetic material for maximum support exactly where you need it. Under the foot, Nike react technology ensures an elastic and reactive gait to grind the miles that count. Nike react technology for a soft and responsive gait. Flyknit invoice for breathability, flexibility and lightness. Soft synthetic material for maximum support on the medial area. Flyknit tongue for a soft and comfortable fit on the back of the foot. Shaped foam collar for soft ankle comfort.