WHY COLDER IS BETTER
The human body temperature sits at around 37deg celsius (98 deg F). Inflamed joints throw off even more heat, so reducing the temperature of the injured site is no mean feat.
Put simply, if your injury site its not at 10-13 deg, your treatment is not working. Its why most ice packs are ineffective, as they are simply not cold enough.
The RE3 system is far better than your messy bags of ice, or your frozen packets of peas.