Our warm stickers contain iron powder, vermiculite, activated carbon. It can be extremely long lasting heating, safe and effective, up to 10 hours of high temperature, warm hands, bodies and feet, let the whole body warm up. Its use method is very simple: first take out the patch, open the outer bag, tear off the back film, and then put the warm sticker on the inside of the clothes, the thermal insulation effect can last 18 hours. After use, the chemical reaction releases heat, raises body temperature, warms hands and feet, and ensures that you are always warm when you go out.