The following Body Cooling Products may be of interest:
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"Our daughter has a very rare genetic deletion called 22q13 or Phelan McDermid Syndrome. Body temperature regulation is effected by this and if it's over 80° Fahrenheit outside she can only spend a few minutes out. This phase change Stay [Cool 58] [Cool Kids Cooling Vest] has helped greatly. She was able to watch her brother play baseball games thanks to this technology."
-William in Alabama