USB necktie with built-in fan keeps you cool, single
 

Ain't nothing classier than a clip-on tie...except one with a built-in USB-powered fan in the knot. We're not certain how this thing keep you cool, or why you wouldn't just use any of the million other USB-powered fans that don't increase your dork factor by 1000, but the people in the photos look so blissfully content we're actually a little curious.

http://www.engadget.com/2007/08/10/u...u-cool-single/