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Poof of concept
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This range of undergarments contain quilted pockets filled with a
phase change substance with a transition point just around 40C.
(above normal body temperature of 37C). Worn underneath the
assortment of winter clothes, it absorbs heat generated by
human activity, thus reducing
over-heating. When the vigorous
activity ceases and the cold outside temperature begins to make
presence felt, the pockets undergo phase change back to solid
and release heat back to the body.
Obvious markets would be for winter athletes such as those
in sports such as the Biathlon, Cross Country Skiing or Gridiron
Football. Tree loggers, hunters and ice fisherman who have to
to their destinations then have periods of inactivity In the cold
benefit. Unlike other pocket heaters these are reusable and
no external fuel source.
Baked. [spidermother, Dec 15 2013]
||Good for winter cycling in the snow and ice - sweat going up hills, shiver going down.
||(+) for the concept... and another (+) for the link.
||//More than two decades ago//.
||That means I'm two decades behind NASA :(
positive side, that makes me about two decades ahead of
||Great link [spidermother]
||And in the summer when it gets to hot they simply