Cool&cold hat insert PCM gel hat

Phase Change Material (PCM) is an ideal product for thermal management. It is used for storing and releasing engergy. The process of changing physical properties is called a phase change process, in which a large amount of latent heat is stored or released by the phase change material. Nowadays the Phase Change Material is widely used in human life, it becomes the one of the best energy-saving and environmental protection carrier. Phase Change Material (PCM) is a collective term for all materials that can change phase. So this material can alternate between forms of solid, gas and liquid. Two temperature : 18 ℃ & 28 ℃