Goodbye Frozen Peas, Hello Migraine Mask! Melt away the tension. Let this cheerful migraine relief eye mask ease the pain while lifting your spirits. This relaxing, well-designed mask can be applied warm or cold. For heat therapy: place eye mask in the microwave and warm for 30 seconds. Always test the temperature of your mask before applying to your skin. For cold therapy: store in the freezer until ready to use. Dimensions: 9" x 4" x 0.5".