Koolaburn Sterile Burn Dressings cool by evaporation. The soft gel, comprised of 96% water in a base fabric of polished non-woven polyester, draws heat away from the burn. This provides a cooling effect which lasts for up to eight hours. Unlike instant cold packs, Koolaburn Sterile Burn Dressings conform to body areas for unbroken contact and improved cooling. Since there is no need for refrigeration, Koolaburn Sterile Burn Dressings are ready to use instantly. They are nontoxic and nonirritating and because they are sterile, there is no risk of contamination or infection. Koolaburn Sterile Burn Dressings help prevent further spread of the burn while helping to relieve pain.