Hand warmer gloves, trouser pockets or your hands. Functions through the well-proved oxidisation process following the introduction of oxygen. Generates comfortable warmth (max. 65°C, average 55°C) up to max. 8 hrs. Hand, foot and body warmer information.Do not use for medical use. Not suitable for children under 6 years of age. Do not use on swollen, injured, sick, frostbitten or sensitive skin. To avoid burns, please remove the heat pads immediately if they become uncomfortably hot. Avoid direct contact with the skin. If skin reactions, burns, swelling, etc. occur after or during use of the heat pads, please stop using the heat pads and seek medical attention. Do not puncture or cut the pads or allow the contents to come into contact with eyes or mouth. The heat pads contain iron powder, salt, activated charcoal, water and vermicult. You can dispose of the heat pads in the residual waste. The heat pads work when oxygen is supplied. That is, as soon as you open the package, the oxidation process begins, which generates the heat. By lightly kneading the heat pad when the package is open, you can speed up the oxygen supply a bit and thus bring about the heat process sooner. Under oxygen exclusion, the heat generation process stops.