It can be used for both hot and cold, so it can be used all year round. Warm in the microwave; Cool and soft in the freezer; Soft type that fits perfectly to the body. Can be heated in a microwave. When kept in a household freezer, it cools from -10 to -20 degrees Fahrenheit and will not freeze it. It can be heated or chilled in the freezer, and it will fit anywhere on your body. Can be used repeatedly.