Medicare Reusable Hot and Cold Pack, Medicare Reusable Hot and Cold Pack for relief from strains and pains, Heat Therapy: For effective relief from muscular aches and pains,joint stiffness,backache,strains and sprains, Cold Therapy: For fast relief from sprains,strains,bruises and swelling,headaches and minor injuries, Contents: Gycol and water and antifreeze, Reusable , Microwavable Pack Size :1