The Mercurial Vapor SuperFly II football boot ranks as one of the most technologically advanced shoes ever created by Nike. Unveiled by former World Footballer of the Year Cristiano Ronaldo, these sleek ultra-violet bullets are armed with a revolutionary adaptive traction system that promises blistering acceleration. Watch out for them as they tear across pitches at the World Cup this June.
From the Press Release
In developing NIKE SENSE adaptive traction technology, designers created an adaptive stud that can extend and retract by up to 3mm, based on ground conditions and pressure exerted by the player. Directionally positioned blades maximize cutting and allow for quick changes of direction, while secondary toe traction provides added toe-off power for those first critical steps. The result is a boot that enables greater speed in all directions.
Nike’s design and engineering teams talked with some of the fastest players in the world, who emphasized that acceleration around a defender is just as important as beating him in a straight line. The Nike Sports Research Lab researched the world championship finals in 2006 and found that there were 845 slipping events over 63 games, or roughly 14 per game. Building on these insights, the Nike team collaborated closely with elite athletes including Cristiano Ronaldo, Zlatan Ibrahimovic and Alexandre Pato to create a boot that enables toe-off acceleration and minimizes slippage in game-changing situations.
“For me, it’s all about first-step acceleration, but twisting and turning around a defender is also important,” Cristiano Ronaldo said. “The Mercurial Vapor Superfly II helps me do both, so I can beat my opponent and create scoring opportunities.”
Athlete insights also pointed to the desire for a close fit around the foot without compromising on durability or support. Next-generation Nike Flywire technology incorporated into the boot’s streamlined upper provides a lightweight, strong and more dynamic fit. The carbon composite tuned chassis provides a lightweight platform with traction elements and allows players to stay closer to the ground.

