Nike Zoom Superfly R4: Improving upon the success of the Nike Zoom Superfly R3, the Nike Zoom Superfly R4 fuses revolutionary NIKE Flywire with a lightweight spike plate that has been proven on the track by some of the fastest runners in the world. Dynamic Nike Flywire cables move with the foot, offering support and comfort while minimizing weight and bulk. The super strong Flywire cables individually wrap around the foot and connect to the laces for a more personalized fit and outstanding lockdown. The ace-span liner presents a smooth seamless interior for comfort against the skin, and ultra-thin TPU film overlays provide additional support in key areas while maintaining the shoe’s super-lightweight feel.