HOT/COLD GEL PACKS provide soothing relief for sore, achy or injured muscles and joints. Versatile thermal packs let you apply cold compresses to reduce swelling and inflammation, or gentle heat to stimulate blood flow. They heat up in the microwave in just 30 seconds; chill quickly in the freezer. Ideal for headache and toothache pain, too! Set of 3 gel-filled nylon packs; each measures 5" x 5".