Thermal Dampener Cyberware, Creation thread Options

[Backgammon]

I was making a a ninja-ish cyber NPC the other day, whom I gave Reuthenium Dermal Sheating. But then I thought, well crap, the PCs all have thermal vision, so what's the point? I kinda fudged on the spot a "rating 5 thermal dampener" for her, but I figured making something real might be better on the long term.

So, anyone got any ideas on how this might work?

My logic so far is as follows: in order to hide heat, you have to catch it as it exits the body, so you can't juts stick a heat-sink in the middle of the body. And generally, using a heat-sink probably isn't viable, unless you include the need to vent trapped heat every now and then (or face eventual combustion). A cooling system might be better. So the best I have right now, is a mesh wiring under your skin ciculating coolant. But would that be detrimental to one's health? I mean, if you lower your body temperature, you're going to die, right? So you'd need a system that lowers the visible temperature of your body, without actually lowering it...

Any other ideas? And don't say "make a suit with thermal dampening from CC". The point is to create useable cyberware.