Hot and Cold Action Pack is more convenient than traditional heating pads or ice packs - try it once and you'll never go back to them again! This two-in-one wonder has a special hot/cold gel design and is medically recommended for treating common ailments and injuries including: backaches, knee problems, arthritis pain, stiff joints, sore muscles, cramps, strains, sprains, bumps, bruises and more. Put it in the freezer and use it to ice down injuries. Or pop it in the microwave and use it for soothing aching muscles. Each one measures 16'' x 11'' to fit all your needs!