Pullover Body Cool Constant Vest

Our rugged all-round PCM technology cooling vest helps in lower body temperature and maintain a comfortable environment, particularly in hot conditions or during physical activities. 1. When the Ambient temprature rises, PCM start to melt. 2.During the phase transitition, the PCM stores energy as latent heat, maintaning a constant temprature until the cooling product is completely melted. 3. When the ambient temprature lower, the PCM starts to recrystallize. 4. When the PCM starts to recrystallize. it releases the stored latent heat, while mainting a constant temprature, until all latent heat has been released. The material is in a solid state below 21 ° Celsius .