Relief pack moist heat packs are a simple and effective method of applying moist heat. Each Relief pack can provide 30 minutes of therapeutic moist heat. Relief packs can be heated in water, stove top or in a microwave. When treatment is complete the hot packs can be stored in a plastic bag in the freezer. Apply moist heat packs with a terry cover or a heavy towel for safety. Soothe discomfort from: stiff joints, neck and back pain, arthritis, sprains and bruises. Measures 12" length by 5" width.Relief Pak