Note: Wash the sleeve before first use. Before you apply the thermopad to the breast, make sure its temperature is acceptable by testing it on the back of your hand. Always use the thermopad together with the sleeve provided. Safety tips and troubleshooting: Do not heat the thermopad in a microwave. Do not use the thermopad without the sleeve provided. Never put the frozen thermopad directly onto your skin. Do not put the thermopad on damaged skin. Do not use the thermopad while you are feeding your baby or while expressing milk with a breast pump. If the thermopad becomes damaged or appears to be leaking, stop using it and throw it away. Do not swallow the contents of the thermopad. After freezing, the gel inside the thermopad has a snow-like appearance. This is normal. The gel in the pad returns to its normal condition in a few hours. If you have any concerns about using the thermopad, please consult your doctor or midwife.