If you've looked at Williams' collaborations with Burn Rubber and Distinct Life and wondered why there are a lot of runners, there's a reason for it: That's what Williams likes. And when it comes to Reebok, he prefers the GL 6000. He told us, "Aesthetically I love runners. Tech running is my thing. When I looked at everything that Reebok had to offer, the GL6000 was my favorite silhouette."