Multipurpose. Used for cold or hot therapy cold therapy can be used for headache fever toothache sprain bruises bumps and other sports injuries while hot therapy can be used for muscle pain & spasms sprain strain & stiffness etc Easy to use. For cold therapy simply fill with ice cubes and a little water to relieve discomfort. For hot therapy just add some hot water (not boiling) and apply to the needed areas. This attractive ice cool pack is made of waterproof rubberized fabric with a plastic screw cap to securely keep the cold and wet inside the bag