Adidas Releases 'Illegal' Running Shoe So Fast, It's Banned In Elite Races DesignTAXI.com adidas Adistar Jellyfish Pharrell Williams Real Green Men's JP9260 US Amazon.com Adidas Men's Barricade 13 Tennis Shoes Tennis Shoes Black Zero Metallic Lucid Lemon 6.5 Medium Tennis & Racquet Sports A RUNNING SHOE SO FAST IT'S BANNED Adidas Prime X 2 Strung Review 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