Even if soccer hasn't quite broken into the mainstream in the US, it's impossible to deny the sport's vibrancy around the world. And Nike has been both tapping into the fanbase, and simultaneously injecting a forward thinking - yet accessible - fashion into the sport. A perfect example is the new signature boot for Cristiano Ronaldo, the Real Madrid player recognized as easily one of the greatest to ever play the sport. The CR Mercurial Vapor SuperFly III represents the pinnacle of soccer boot design and engineering, leveraging Nike's most advanced technology. But high tech soccer boots aren't necessarily very interesting in their own right - Ronaldo's new boot is set apart by it's aesthetic, inspired by the tonal black-on-black safari print of the Nike Air Safari introduced in 1987, which is still coveted today. Nike Soccer has also created the value added feature of giving each pair a unique user code, which allows the owner to access training insights from top players and coaches through Nike Football+. Cristiano Ronaldo will debut the CR Mercurial Vapor SuperFly III during "El Clasico" on Saturday, April 16th, and the boot will be available at retail globally and online at www.nikestore.com beginning April 29, 2011. Check out detailed images after the jump.