We're well aware of water cooling in engines, and hell, even in computers, but a water-cooled t-shirt isn't such a common idea. The Club System 24 is a t-shirt that is wrapped with eight feet of double insulated hose that flows cool water around the body keeping you nice and relaxed in that sweltering-hot car. The Club System 24 is designed with the endurance racer in mind who can withstand a little extra weight and space to, you know, stay alive during those long races where air conditioning is non-existent. A small cooler holds the cold water and a pump. Other options include fire-retardant shirts, SFI-approved FireWear, drain kits and emergency pull-release connectors. The entire system will set you back $300. [Club System 24 via AMG]