Precautions for the use of foot warmers
1. Foot warmers for feet only, can not be used for heating other parts, to avoid scalding.
2. Foot warmers can not stick directly on the skin.
3. Do not use foot warmers while exercising.
4. Do not open the foot warmers when not in use to avoid failure.
5. Please keep foot warmers out of reach of children to avoid accidental ingestion.
6. Foot warmers should be stored in a cool, dark place, relative humidity is not more than 80%, no corrosive gases, well ventilated room.