Thermal Insulated Patch with Heart Design. Reusable & with a Long-lasting Heating Effect. It is Activated by Bendy the Inside Metal Badge So That the Patch Hardens & Heats Up. for Reusing, Heat Water in a Pot with the Patch Inside Until the Inner Gel Returns to Its Liquid State. It Will be Ready to Reuse by Pressing the Metal Plate Again. Instruction Manual Available in Spanish & English. Colours: Red. Minimum Quantity: 250.