Nike Zoom Vaporfly 4%

A four percent gain in efficiency might not mean much on a jog around the neighborhood, but when you're running a marathon, it means a lot. The Nike Zoom Vaporfly 4% promises that exact improvement over their previous fastest marathon shoe. Born from the company's Breaking2 project — an effort to break the two-hour marathon barrier — they have a full-length carbon fiber plate that minimizes energy loss, a ZoomX midsole for cushioning and bounce, and a Flymesh upper to provide support without constraint. The result is the fastest shoe Nike's ever made for distance runners, and, perhaps, the first to cross the finish line in under 120 minutes.