Jue-Fish Foot Warmer Thermal Portable Disposable Heating Cold Repellent Foot Warmer

Our Foot Warmers contain iron powder, water, and activated carbon. They provide long-lasting heat that's safe and effective, warming both feet and the whole body. Using them is simple: first clean your feet, then put on warm socks, tear them open and stick them on the socks. Your feet will slowly warm up and stay warm for up to 8 hours. After use, you can be sure to stay warm when going out, no longer cold in winter