Under Armour teams up with Muhammad Ali for the SpeedForm Phenom training shoe celebrating The Greatest of All Time. The boxing and sports legend lends his name to the clean colorway of the high-performance training shoe with a white ArmourVent™ upper, innovative, strategically-cored midsole in black with speckles, icy blue outsole, and red accents. It’s then completed with “THE GREATEST” on each tongue. Float like a butterfly over to UnderArmour.com to pick up a pair right now.