The Jordan Why Not Zer0.3 “KB3” is a special iteration of Russell Westbrook’s latest signature shoe which pays homage to his late best friend and teammate, Khelcey Barrs III. Donning a “KB3” patch noted on the lateral side, the upper is draped in a Green and Desert Sand color scheme inspired by camouflage print, which represents how the two friends were always ready to go to battle for each other.