A cooling composition for application to the skin of a mammal, such as a human. The base of the composition is an interpenetrating polymer network, which may contain a thermo-responsive polymer. Having a Critical Temperature above an average core body temperature, the material may undergo a phase change as the creature becomes too warm, such as when a person experiences a hot flash, a fever, exposure to very warm environments, physical exertion, and the like. The phase change results in a cooling and/or cooling sensation of the skin. Additives may be included in the cooling composition such as evaporative cooling components, neurosensory cooling components, and additional phase change components.
