The TurboSpeed is a super-light track suit that Nike claims will improve 100-meter dash times by as much as .023 seconds. To put that into perspective, in the 2008 Olympics 100-meter men’s final, .023 seconds would have been the difference between a personal best and a world record for the winner, Usain Bolt. It would have also been the difference between a 4th-place finish and a 3rd-place finish. Granted, we don’t know if that figure holds for the real world. But it is a remarkably big claim.