When applied to the feet, Bandoo Foot Patches stimulate sweating, allowing the natural herbs and ancient Japanese wisdom they contain to work effectively by absorbing impurities expelled through your feet. These patches are designed to target and draw out toxins, promoting a cleansing process as you rest. After use, you will notice a visible black discharge on the patch. This discharge is a combination of sweat and unwanted materials that have been removed from your body, indicating that the patch has effectively absorbed impurities and contributed to your overall detoxification process.