Dual Use BagFeatures: Make sure you always have one of these ice packs handy! It's amazing for icing down headaches, sore muscles,and other knee or joint pains. Get immediate cold therapy by just putting ice cubes or crushed ice in the bag and locking it securely. Its superior quality material and leak proof design makes sure that the injured area remains dry and provides you with that needed relief. The great must have ice bag for every household!