Thermotherapy After only a few minutes in the microwave, the Cherry Stone Thermal Pillow gives out a long lasting, and penetrating heat. Neck tension, stomach cramps, backache and headache are eased as the pillow moulds to body contours. Ideal for use with children. Use also as a cold compress for bumps and sprains, 100% Natural. Heat in the Microwave and Cool in the Freezer. Machine Washable