within it the hollowed spaces is not open to the atmosphere it 39 s only open to the tube 2 that brings in the r 245fa vapor the condensing block 5 is kept at a temperature lower then room temperature via a thermoelectric module 6 the thermoelectric module 6 produces a temperature differential between its hot side and its cold side when electricity is allied to the thermoelectric module 39 s two wire leads 9 10 the cold side of the thermoelectric 6 is pressed against the condensing block 5 and the hot side is pressed against a heat sink 7 heat from the thermoelectric 6 is transferred in to the heat sink 7 and dispersed throughout the heat sink 7 a fan 8 blows ambient air on to the heat sink 7 heat from the heat sink 7 is transferred in to the ambient air which takes the heat away from the present invention fig3 is a partial perspective view of the bladder 1 incorporated in the present invention with the top layer partially broken away the bladder 1 is comprised of two opposing butyl sheets sealed at the edges with channels 12 to give the pad structure a spongy pad 11 is contained with in the bladder 1 along with r 245fa liquid the spongy pad 11 acts as a wick to draw in the liquid r 245fa and to give added comfort to the user a tube 2 is connected to the bladder 1 to provide a means for the r 245fa vapor to leave the.