ICE Pack Double coupling polyethylene bag that contains a mixture of nitrogen salts and a water bubble. After breaking the bubble contained inside the bag, an endothermic instantaneous cooling process is developed immediately device commonly used in case of bruises, sprains, traumas, hyperthermia and in all cases in which cryotherapy and use of the cold is needed Thanks to the mixture obtained, the temperature reaches - 5 ° C and reaches 0 ° C in approximately 30 minutes