Banned' shoe rotation A shoe rotation built from shoes that don't comply with World Athletics shoe regulations (but dont worry, no one's checking for us mere mortals) #ProDirectRunning #UnlockRunning S P E N C E R M A T T H E W S I took the Adidas Prime X3, a shoe banned in professional racing, to the track to see how they actually perform and how they compare to Instagram The adidas adiZero Prime x 2 Strung: So Good It's Banned S P E N C E R M A T T H E W S I took the Adidas Prime X3, a shoe banned in professional racing, to the track to see how they actually perform and how they compare to Instagram