Speed is Russell Westbrook's not-so-secret weapon. He out-hustles the competition, building momentum and muscling his way onto the highlight reel. Cue the Jordan Why Not Zer0.4 PF features double-stacked Zoom in the forefoot. It's an extra-responsive cushioning system that's designed to help him transform speed into force and focus his attack. This PF version uses an extra-durable outsole that's ideal for outdoor courts.