After receiving a first look at adidas' adiZero PrimeKnit just yesterday, today the Three Stripes officially unveils its innovative runner. Set to debut at the Olympic Games, the low-top model features a one-piece, seamless construction, all equating to a lighter, more comfortable sneaker. Additional imagery of the red and white pair done for the 2012 Games can be seen above, while a wider (but still somewhat limited) release featuring more colors is scheduled for this fall with a retail of $250.