This REVOLUTIONARY pack is the FIRST Ammonium Nitrate FREE, Urea based formula to rival the temperature ranges of previous formulas. InstaKool is a SAFER & HAZ-MAT FREE Instant relief of pain and swelling caused by sprains, strains, contusions, minor burns, toothaches, and insect bites. InstaKool is designed for first aid treatment. It quickly helps reduce swilling, ease pain and promote faster.