Some folks at MIT developed a &quot;body heatsink&quot; a few years back. <a href="http:&#x2F;&#x2F;www.wired.com&#x2F;2013&#x2F;10&#x2F;an-ingenious-wristband-that-keeps-your-body-at-the-perfect-temperature-no-ac-required&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.wired.com&#x2F;2013&#x2F;10&#x2F;an-ingenious-wristband-that-kee...</a>