... , back aching, cramps arthritis pain 5.To recharge: place the hot pack in boiling water with cloth below,notes:prevent the plastic ... is to start crystallization, when the crystallization completed,squeeze the hot pack to make it soft and ready to use 7.Excellent ... soft, this hot pack gives soothing effect to rheumatic conditions of joints as well as pain caused by abdomen,stomach,waist,leg,shoulder ...