Apparently, being cool helps your physical performance. As someone who spends altogether too much time sitting in a chair staring at a computer screen, I don't have what you would call an active lifestyle. But for you superstar athletes out there, this icy vest can apparently take your performance to the next level.
Essentially, it's a vest that's full of ice. If you wear it for about an hour before hitting the field, your endurance will be increased by up to 21%. That seems like a figure that'd be difficult to confirm, but if keeping yourself nice and chilly before a match, game or race could really help you perform better, I don't see why you wouldn't use it.