For maximum speed at short distances, the Nike Zoom 400 'Hyper Royal' is built to have minimal weight and zero distractions. The Flyweave upper is breathable and flexible, offering athletes a barely-there sensation, while an integrated tongue and contoured shape form to the foot for an anatomical fit. Under the foot, a soft Phylon midsole provides cushioning, and seven forefoot spikes grip the track for quick acceleration.