Filled with natural cherry stone,can heat in microwave oven. And disinfected by ultraviolet radiation,,sterilized with CE ... u-shaped pillow for your neck is the solution. Microwave it for a warm session, or freeze it to ... area. For hot therapy,warm about 3 minutes in microwave and the heat-retaining cherry stones give out a long ... certificates for customers Below is our CE certificate: Microwave Pillow