The Back & Abdomen Hot and Cold Pack is a high quality everyday use heat pad. It is designed for maximum relief and comfort. It was primarily designed to strap on to the lower back with an elastic Velcro strap (fits all sizes), so that your hands are free and you can apply it very conveniently. It targets sore and tense lower back, disk pain, arthritis, muscle relaxation, and more. The Back and Abdomen can also be used for other parts of the body and is very popular as a menstrual cramp reliever for women, or can also be wrapped around the knees, thighs, and around other parts of the body. It serves as a great multi-purpose heating pad. Simply Heat In the microwave for Heat Therapy or chill in the freezer for Cold Therapy. Heat Therapy can be applied to any type of injury or ache as it increases blood circulation, accelerates the relief of sore and tense muscles to enable the body to move more at ease, and has the ability to penetrate deeply to the center of the painful and irritated muscle and ease the pain away. Cold Therapy provides a chilling refreshment for the body and skin to relieve burns and irritations as well as inflammation of joints or bruised areas, and reducing fever and body heat. The great thing about this product is that it is 100% natural, made in U.S.A. and can be used over and over again! It can be used Hot, Cold, Moist, or room temperature when ever you desire!