A Water cooled T-shirt
 

It was about two years ago when I first saw ice vests in a running catalog and thought something along the lines of “wouldn’t that be a sweet thing to wear in the car on the way to school instead of blasting my (non-working) A/C!” Well, it seems the idea hasn’t quite died. Some users on the EcoModder forums have recently been discussing this idea, so I thought I’d put together some of the ways I know to beat the heat without turning on the A/C, which reduces your fuel economy.

http://ecomodder.com/blog/2008/04/27...gh-your-shirt/