US Patent 7043765 Shirt with cooling collar and cooling pockets

A shirt includes a collar with inner and outer layers forming ice pockets spaced around the collar. The pockets are for ice to cool the main blood vessels and spinal nerves in the neck of the wearer. In use, the collar is either in an upstanding closed position around the wearer's neck in a turtleneck fashion, or in a spread-open position if the closed collar is too warm or too cold. The shirt also includes ice pockets behind armpit locations where arteries are close to the skin. The shirt enhances the transfer of heat from the wearer to melt ice in the ice pockets, to warm the meltwater, and to evaporate the water.